The correct option is B Rs. 12,500
Here, Sunil paid Rs 5,00,000 for 10,000 shares for allotment. The amount to be paid on allotment was Rs 25*10,000 i.e. Rs 2,50,000. The balance of amount paid by Sunil was to be adjusted towards first and final call i.e. Rs 2,50,000. As per Table F of schedule I of the act, the interest on call in advance if not metioned in AOA shall be levied at 12% p.a. Here, 12% of Rs 2,50,000 is Rs 30,000. First and final call was paid on 1st June whereas directors made first and final call on 31st October which means advance was paid Share was paid 5 months before. Hence, amount of interest paid to Sunil on Calls-in-Advance will be (Rs 30,000/12)*5 i.e. Rs 12,500.