Correct option is C
Given: 5123487
Arranged in ascending order from left to right:
Given Number | 5 | 1 | 2 | 3 | 4 | 8 | 7 |
Ascending Order | 1 | 2 | 3 | 4 | 5 | 7 | 8 |
The position of None digits will remain unchanged as compared to that in the original number.
Thus, correct option is (c).