The banker's gain on a sum due 6 years hence at 12% per annum is Rs. 684. What is the banker's discount?  Choose the correct choice from the following options:
A) 1240  B) 1120  C) 1190  D) 1634  E) none of these

Rationale: "explanation : td = ( bg × 100 ) / tr = ( 684 × 100 ) / ( 6 × 12 ) = rs . 950 bg = bd – td = > 684 = bd - 950 = > bd = 684 + 950 = 1634 answer : option d"
Answer: D