In what time (in years) will ₹2,500 fetch an interest of ₹1,000 at 10% per year simple interest?

Correct option is C

​Given:
​Principal (P) = ₹2,500
​Simple Interest (SI) = ₹1,000
​Rate of Interest (R) = 10% per annum
​Formula Used:
​The formula for Simple Interest is:
​​$$SI = \frac{P × R × T}{ 100}$$​​​
​Solution:
​From the formula, 
​​$$T = \frac{\text{SI} \times 100}{\text{P} \times \text{R}}\\T = \frac{1,000 \times 100}{2,500 \times 10}\\T = \frac{1,00,000}{25,000} = 4 \text{ years}\\\text{Thus, the sum will fetch a simple interest of ₹1,000 in 4 years.}\\$$​​​​