Explanation:

- To determine A's share in the final project profit, first calculate their sharing ratio from the initial investments.

- A's investment: Rs.1,50,000, B's investment: Rs.2,50,000. Ratio = 3:5.

- Profit from initial business = Rs.6,00,000.

- A's share in initial profit = (3/8) * 6,00,000 = Rs.2,25,000. B's share = Rs.3,75,000.

- After adding Rs.50,000, A's total investment in the next project = Rs.2,75,000, and B's = Rs.4,25,000.

- The yield from the project = Rs.4,20,000.

- New ratio = 2,75,000:4,25,000 = 11:17.

- A’s share = (11/28) * 4,20,000 = Rs.1,65,000.

Given options, A's share in the profit is Rs.1,65,000.

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