Flow takes place at Reynolds number of 1500 in two different pipes with relative roughness of 0.001 and 0.002. The friction factor
(A) Will be higher in case of pipe with relative roughness of 0.001
(B) Will be higher in case of pipe with relative roughness of 0.002
(C) Will be same in both pipes
(D) In the two pipes cannot be compared on the basis of data given