Correct Answer - b
(b) Let the Principal (मूलधन) Rs. 100
According to the question,
`R = 10% = (1)/(10)`
100 (Principal)
` 2^(nd)` years C.I interest = 11 units
11 units - 132
1 units - 12
`100 "units" - 12 xx 100 = 1200`
`therefore` Principal = Rs. 1200
