The correct option is C 1,75,00,000
Let us express all values in the Indian Numeral System:
We know that 1 million = 10,00,000
Then 20 million = 2,00,00,000
Arun had 2,00,00,000
He invested = 25,00,000
Money left with him = 2,00,00,000 - 25,00,000 = 1,75,00,000.