Explanation:

- Let's analyze the financial distribution. Arvind distributes 50% of his total money to his son. He then gives 30% of his money to his wife.

- This leaves him with 20% of the total money, as 50% + 30% = 80%.

- Out of that remaining 20%, Arvind donates 62.5% to a trust. So, he is left with 37.5% of the remaining 20%.

- Mathematically, this is 20% * 37.5% = 7.5% of his initial money.

- Arvind is left with 15,000 Rs. which is 7.5% of what he originally had.

- If 7.5% is 15,000 Rs., then 100% is 15,000 Rs. / 0.075 = 2,00,000 Rs.

- The correct answer is Option: 4 - 2,00,000 Rs.

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