Correct option is D
Given:
Amount after 3 years = ₹1,200
Amount after 4 years = ₹1,350
Formula Used:
Simple Interest (SI) = Principal (P) × Rate % (R) × Time (T)
Amount = Principal + Simple Interest
Solution:
SI in 1 year = 1350 – 1200 = ₹150
SI in 3 years = 450
450 = Amount – Sum
Sum = 1200 – 450 = ₹750