An amount invested is Rs 4000 and return is Rs 300 then rate of return will be

The correct answer is A. 4.30%.

The rate of return is calculated by dividing the return by the investment amount and multiplying by 100. In this case, the return is Rs 300 and the investment amount is Rs 4000. So, the rate of return is 300/4000 * 100 = 4.30%.

Option B is incorrect because 3.70% is not the rate of return.

Option C is incorrect because 7.50% is not the rate of return.

Option D is incorrect because 0.08% is not the rate of return.