Explanation:

To solve this, let's calculate the share of B in the profit.

- Initial Investments:

- A: Rs. 10,000

- B: Rs. 10,000

- C: Rs. 10,000

- After 6 Months Adjustments:

- A: Invests Rs. 2000 more ? Total Rs. 12,000 for next 6 months

- B: Invests Rs. 6000 more ? Total Rs. 16,000 for next 6 months

- C: Withdraws Rs. 2000 ? Total Rs. 8,000 for next 6 months

- Investment Calculation Over 12 Months:

- A: (10,000 * 6) + (12,000 * 6) = Rs. 132,000

- B: (10,000 * 6) + (16,000 * 6) = Rs. 156,000

- C: (10,000 * 6) + (8,000 * 6) = Rs. 108,000

- Profit Distribution Ratio:

- Total = 132,000 + 156,000 + 108,000 = Rs. 396,000

- B's share in the profit: (156,000 / 396,000) * Rs. 50,490 = Rs. 19,890

- Conclusion:

- Option 1 - Rs. 19,890 is the correct answer.