Each of the following questions consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. What is the principal amount invested? Statement I: The simple interest earned on the principal at 10% per annum for 2 years is Rs. 1,200. Statement II: The compound interest earned on the same principal at the same rate of interest for 2 years is Rs. 1,260.

Let the principal amount be Rs. P. From I, Rate of interest (R) = 10% per annum, Time (T) = 2 years, Simple Interest (SI) = Rs. 1,200 ATQ, SI = (P * R * T) / 100 Or, 1200 = (P * 10 * 2) / 100 Or, 1200 = 0.20 * P So, P = 1200 / 0.20 = Rs. 6,000 So, Statement I alone is sufficient to answer the question. From II, Rate of interest (R) = 10% per annum, Time (T) = 2 years, Compound Interest (CI) = Rs. 1,260 ATQ, CI = P * [(1 + R/100)^T - 1] Or, 1260 = P * [(1 + 10/100)^2 - 1] Or, 1260 = P * [(1.1)^2 - 1] Or, 1260 = P * [1.21 - 1] Or, 1260 = 0.21 * P So, P = 1260 / 0.21 = Rs. 6,000 So, Statement II alone is sufficient to answer the question. Therefore, either Statement I alone or Statement II alone is sufficient to answer the question. Hence, the correct answer is C.