How much time (in years) will it take for an amount of Rs. 4,50,000 to yield Rs. 45,000 as simple interest at a 5% per annum rate of
interest?

Correct option is C

Given :
Principal (P) = Rs. 4,50,000
Rate (R) = 5%
Simple Interest (SI) = Rs.45,000
Formula Used :
​$$S.I.=\frac{(P×R×T)}{100}$$​​
Solution:
​$$S.I.=\frac{(P×R×T)}{100}\\\ \\45000 =\frac{(4,50,000×5×T)}{100}\\\ \\=> T = 2 years$$​​