The initial capitals. of two persons A and B in a partnership business are Rs.40 lakhs  and Rs.60 lakhs, respectively. After 4 months each of them invested Rs.10 lakhs. If the profit at the end of the year is Rs.13.6 lakhs, then the difference in their profits in lakhs of Rupees is

A

3.2

B

3.0

C

2.8

D

2.4