In order to obtain an income of Rs. 680 from 10% stock at Rs. 120, one must make an investment of Pick
A) 5363 B) 8160 C) 2368 D) 1987 E) 2732

Rationale: "to obtain rs . 10 , investment = rs . 120 . to obtain rs . 680 , investment = = rs . 8160 . answer : b"
Answer: B