Damru brings Rs.25000 for his 1/4 share, then full capital of the firm should be = Rs.25000 X 4 = Rs.100000
Out of total capital of Rs.100000, Rs.75000 should be the sum of capitals of Ram and Shyam in the ratio 3:2 because even after Damru's admission profit sharing ratio between Ram and Shyam does not change.
Ram's Capital = Rs.75000 X 3/5 = Rs.45000
Shyam's Capital = Rs.75000 X 2/5 = Rs.30000. So, option C is most appropriate.