A and B start a business together by investing Rs. 10,000 and Rs. 12,000. After 4 months A invests Rs. 5,000 more and B withdraws Rs. 4,000, after another 2 months C joins them with a capital of Rs. 15,000. If at the end of the year the difference of profit of A and B is Rs. 12,000, find the share of C (In Rs.).
1. 20,000
2. 25,000
3. 22,500
4. 25,500