Directions: The following items consist of two statements one labeled as ‘Assertion(A)’ and the other as ‘Reason (R)’ You are to examine these two statements carefully and select the answers to these items the codes given below
(a) Both A and R are individually true and R is the correct
(b) Both A and R are individually true but R is not the correct
(c) A is true but R is false
(d) A is false but R is true
Assertion (A) : In turbulent flow through a commercial concrete pipe, the friction factor is practically independent of Reynolds number but depends on the surface roughness.
Reason (R) : In a flow separation at the roughness length scales of the wall.