This question is based on the five, three-digit numbers given below. (Left) 429 847 922 213 757 (Right) (Example: 697 - first digit =6, second digit =9, third digit =7 ) NOTE: All operations to be done from left to right. If all the numbers are arranged in descending order, the position of how many numbers will remain unchanged?

Correct option is A

Given (Left) 429 847 922 213 757 (Right) 

In descending order left to right

922, 847, 757, 429, 213

in this order, we can observe that only 847 is in the second position in both arrangements

so, only one is answer.