X and Y are partners who share profit and loss in the ratio of 2 : 1, and who have capital balances (credit) of Rs. 40,000 and Rs. 30,000 respectively. If Z, with the consent of Y, acquired one-half of X's interest for Rs. 25,000, for what amount would Z's Capital Account be credited:

A. Rs. 25,000

B. Rs. 5,000

C. Rs. 15,000

D. Rs. 20,000

Answer: Option D