The correct option is A ₹ 64.10
Given: Principal, P = ₹ 1000, rate of interest, r =10% and time, t = 4 years
Simple interest, S.I = P×r×t100=1000×10×4100=₹ 400
The amount at the end of n years when compounded annually,
A=P(1+R100)n=1000(1+10100)4=1000(1110)4=1000×11×11×11×1110×10×10×10=₹ 1464.1
Compund interest, C.I. = A - P =₹ (1464.1−1000)=₹ 464.1
∴C.I.−S.I.=₹ 64.10