The equation in which Q is yearly run off in cm, P is yearly total rainfall in cm, H is difference of R.L.s. of lowest and highest points and A is area of catchment in square metres, is known as

The equation in which Q is yearly run off in cm, P is yearly total ra

1.	The equation in which Q is yearly run off in cm, P is yearly total rainfall in cm, H is difference of R.L.s. of lowest and highest points and A is area of catchment in square metres, is known as
A.	English formula
B.	Khosla's formula
C.	Justin's formula
D.	Vermule's formula.
Answer» D. Vermule's formula.