Each of the digits in the number 7642915 is arranged in ascending order from left to right. The position(s) of how many digits will remain unchanged as compared to that in the original number?

Correct option is D

Given:
The number is 7642915. We need to arrange its digits in ascending order and determine how many digits remain unchanged in their position compared to the original number.

Logic:
Arrange the digits in ascending order and compare the positions of each digit with the original number.

Explanation:
Original number: 7642915
Digits in ascending order: 1, 2, 4, 5, 6, 7, 9

Only digit '4' is unchanged with third place.

Option D is correct.