A. Rs.8000/-
B. Rs.9000/-
C. Rs.6000/-
D. Rs.7000/-
=> Profit sharing ratio = 2 : 3
=> Duration of business = 1 Year = 12 Months
=> A's total investment = 3500 x 12 = 42000
=> B's Investment = Z for (12 - 5) Months = 7Z
=> Ratio of their investments = 42000 : 7Z
=> As Ratio of investment = Ratio of Profit sharing
=> So, 42000 : 7Z = 2 : 3
=> 42000/7Z = 2/3
=> 126000 = 14Z
=> Z = 9000
So, B's investment is Rs.9000/-