Each of the digits in the number 31879452 is arranged in the ascending order from left to right. Which of the following digits will be third from the left in the new number thus formed?​

Given: 31879452

Arrange in ascending order: 1, 2, 3, 4, 5, 7, 8, 9

Third digit from the left = 3

So, 3 will be third from the left in the new number thus formed.

Thus, correct option is (a).