Correct Answer - Option 2 : 839

Hence, the correct answer is option 2.

Given series: 279 839 598 368 296 635

We will first arrange the digits of the number in descending order within the number from left to right.

We get, 972 983 985 863 962 653

Now, we will rearrange these numbers in increasing order from right to left.

New series: 985 983 972 962 863 653

Number, which is second from the left end is 983, which is formed from the number 839.