Explanation:

Correct option 2: 8

Given,
• Eight people are sitting in two parallel rows with four people each in such a way that there is equal distance between adjacent persons.
• 5, 6, 7 and 8 are seated in the same row facing South.
• 1, 2, 3 and 4 are seated in the same row facing North.

• 7 sits at the extreme right end of their row and is exactly opposite 1.
• 4 and 2 do not sit at the extreme corners of their row.

According, to the arrangement '8' sits at the extreme left end of the row of people sitting facing South.
Hence, the correct answer is option 2.