The banker's gain on a bill due due 1 year hence at 12% per annum is Rs.7.8. The true discount is	Choose the correct answer:
A) rs . 72  B) rs . 65  C) rs . 54  D) rs . 50  E) none

Rationale: "solution t . d = [ b . g x 100 / r x t ] = rs . ( 7.8 x 100 / 12 x 1 ) = rs . 65 . answer b"
Answer: B