A, B and C are partners. A's capital is Rs. 3,00,000 and B's capital is Rs. 1,00,000. C has not invested any amount as capital but alone manages the whole business. C wants Rs. 30,000 per annum as salary. The firm earned a profit of Rs. 1,50,000. How much will be each partner's share of profit?

A. A - Rs. 60,000, B - Rs. 60,000, C - Nil

B. A - Rs. 90,000, B - Rs. 30,000, C - Nil

C. A - Rs. 40,000, B - Rs. 40,000, C - 40,000

D. A - Rs. 50,000, B - Rs. 50,000, C - 50,000

Answer: Option D