A sum lent out at simple interest amounts to Rs. 6,076 in 1 year and Rs. 7,504 in 4 years. The sum and the rate of interest p.a. are respectively:

Answer: Option B

SI in three years = 7504 - 6076 = 1428
SI in one year $$=\frac{1428}{3}=476$$
Now we can go through option; from option B
$$\frac{5600\times 8.5}{100}=476$$