A person borrows a sum of ₹50,000 for 3 years at 4% p.a. simple interest. He immediately lends it to another person at
$$6\farc{1}{4}\%$$ p.a. simple interest for 3 years. Find his gain in the transaction per year.

A

₹1,125

B

₹1,135

C

₹1,122

D

₹1,025