Indian Meteorological department uses the standard gauges whose collectors have apertures of
(A) 50 or 100 sq. cm area
(B) 100 or 150 sq. cm area
(C) 100 or 200 sq. cm area
(D) 250 or 500 sq. cm area
(A) 50 or 100 sq. cm area
(B) 100 or 150 sq. cm area
(C) 100 or 200 sq. cm area
(D) 250 or 500 sq. cm area