In a partnership business A, B and C what profit did B get at the end of 2 years ?
I. A and B started the business by investing in ratio 3: 5.
II. C joined after 6 months with Rs. 4 lakhs.
III. After two years, A’s share in profit was Rs. 60000.

Clearly, each statement alone is insufficient as there is missing information about other persons.

I & II : Let A & B started with investment of 3 lakhs & 5 lakhs respectively. C joined after 6 months with 4 lakhs.

=> Ratio of profit = A : B : C = (3*12) : (4*6) : (5*12)

= 36 : 24 : 60 = 3 : 2 : 5

=> B will get two-tenth of the profit.

Thus, I & II together are sufficient.

After combining I & III or II & III, we will still have insufficient information.

Thus, ans - (a).