517 325 639 841 792. What will be the first digit of the second highest number after the position of only the second and the third digits within each number are interchanged?

Options

A. 7
B. 2
C. 8
D. 9

Answer

a

Explanation

If the positions of only the second and the third digits within each number are interchanged, the numbers become as follows.
571 352 693 814 729 Now, when the numbers are arranged in descending order, we get
814 729 693 571 352 Here, 729 is the second highest number Hence, the first digit of729 is 7.