Correct option is D
When a pipes line divides into two or more parallel which again join together at downstream as shown in fig then pipe said to be in parallel.
In order to increase the discharge passing through main pipe, the pipes are connected in parallel.
The discharge in the pipe is equal to sum of the discharge in each of the parallel pipe
Q = QA + QB
When pipes are arranged in parallel, the loss of head in parallel pipes is same.
hA = hB
