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# CBSE Class 12-science Answered

<p class="MsoListParagraphCxSpFirst" style="margin-bottom: .0001pt; mso-add-space: auto; text-indent: -.25in; mso-list: l0 level1 lfo1;"><!--[if !supportLists]--><span style="mso-bidi-font-size: 12.0pt; line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-font-family: &quot;Times New Roman&quot;;">1.<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><!--[endif]--><span style="mso-bidi-font-size: 12.0pt; line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">&nbsp;If R and R&rsquo; are symmetric relations(not disjoint) on a set A. then the relation R</span><!--[if gte msEquation 12]><m:oMath><i style='mso-bidi-font-style:normal'><span style='mso-bidi-font-size:12.0pt; line-height:115%;font-family:"Times New Roman","serif";mso-ascii-font-family: "Cambria Math"'><m:r>&cap;</m:r></span></i></m:oMath><![endif]--><!--[if !msEquation]--><span style="font-size: 11.0pt; line-height: 115%; font-family: &quot;Calibri&quot;,&quot;sans-serif&quot;; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: &quot;Times New Roman&quot;; mso-fareast-theme-font: minor-fareast; mso-hansi-theme-font: minor-latin; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-bidi-theme-font: minor-bidi; position: relative; top: 4.5pt; mso-text-raise: -4.5pt; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> </span><!--[endif]--><span style="mso-bidi-font-size: 12.0pt; line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">R&rsquo; is </span></p> <p class="MsoListParagraphCxSpMiddle" style="margin-bottom: .0001pt; mso-add-space: auto;"><span style="mso-bidi-font-size: 12.0pt; line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-font-family: &quot;Times New Roman&quot;; mso-fareast-theme-font: minor-fareast;">(a) reflexive &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;(b) symmetric&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;</span></p> <p class="MsoListParagraphCxSpMiddle" style="margin-bottom: .0001pt; mso-add-space: auto;"><span style="mso-bidi-font-size: 12.0pt; line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-font-family: &quot;Times New Roman&quot;; mso-fareast-theme-font: minor-fareast;">(c) </span><span style="mso-bidi-font-size: 12.0pt; line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">&nbsp;transitive&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (d) none of these</span></p> <p class="MsoListParagraphCxSpMiddle" style="margin-bottom: .0001pt; mso-add-space: auto; text-indent: -.25in; mso-list: l0 level1 lfo1;"><!--[if !supportLists]--><span style="mso-bidi-font-size: 12.0pt; line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-fareast-font-family: &quot;Times New Roman&quot;;">2.<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><!--[endif]--><span style="mso-bidi-font-size: 12.0pt; line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;">&nbsp;</span></p>
Asked by Dharvi Kumra | 26 Apr, 2015, 07:16: PM
Dear guddu97.k@gmail.com

Thanks for asking us a question in Ask the Expert section of TopperLearning.com.

There should be an operation between R and R'. Please specify the operation between R and R'.

Regards

Topperlearning Team.
Answered by Vimala Ramamurthy | 27 Apr, 2015, 11:41: AM

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