An amount of money is to be divided between P, Q and R in the ratio of 3:7:12. If the difference between the shares of P and Q is Rs.4000, what will be the difference between Q and R's share?	Options.
A) 2788	B) 5000	C) 7282	D) 2782	E) 2729

Rationale: "4 - - - 4000 5 - - - ? = > 5000 answer : b"
Answer: B