Aman started a business investing Rs. 70000. Rakhi joined him after six months with an amount of Rs. 105000 and sugar joined them with Rs. 1.4 lakhs after another six months. The amount of profit earned should be distributed in what ratio among Aman, Rakhi and Sagar respectively, 3 years after Aman started the business? `7:6: 10` b. `12 :5: 16` c. `42 : 45 : 56` d. Cannot be determined e. none of these