Pick up the incorrect statement from the following

Q. Pick up the incorrect statement from the following:

A.            Lead is the average horizontal straight distance between the borrow pit and the place of spreading soil

B.            The lead is calculated for each block of the excavated area

C.            The unit of lead is 50 m for a distance upto 500 m

D.            The unit of lead is 1 km where the lead exceeds 2 km

Answer: The unit of lead is 1 km where the lead exceeds 2 km