NEET Class neet Answered

For streamlined flow, Reynold's number should be less for fluid. 

Reynold's number is given as, 

where, 

R is Reynold's number

ρ -> density of fluid 

μ -> viscosity

v -> velocity of fluid 

d -> diameter of pipe

For Reynold's number to be less, density should be less and viscosity should be high. 

Thus, the correct option is (b) -> low density and high viscosity.