In the ratio of 7/2: 4/3:6/5. After 4 months, B and C enter into a partnership, If the total profit at the end of one year be Rs. 21,600 when A increases his share by 50%. then B share in the profit is?

• A. Rs. 2100
• B. Rs. 3600
• C. Rs. 2400
• D. Rs. 4000