A, B and C invested Rs.6300, Rs.4200 and Rs.10500 respectively, in a partnership business. Find the share of A in profit of Rs.13000 after a year?  Options:
A) 3630 B) 3900 C) 8828 D) 2387 E) 2813

Rationale: "6300 : 4200 : 10500 3 : 2 : 5 3 / 10 * 13000 = 3900 answer : b"
Answer: B