Due to a reduction of $6\frac{1}{4}\%$ in the price of rice, Sanjeev is able to buy $1\text{ kg}$ more for Rs 120. Then :
A. the original rate of rice = Rs 8 per kg
B. the reduced rate of rice = Rs 7.20 per kg
C. 40% of the original rate of rice = Rs 3.20
D. 80% of the reduced rate of rice = Rs 6 per kg
Choose the correct answer from the options given below: