Correct Answer: 2, 4, 6, 3, 5, 1

Solution : Given:

Let's check each option –
First option: 3, 4, 1, 5, 2, 6→CELIPN, not a meaningful word.
Second option: 6, 5, 3, 4, 1, 2→NICELP, not a meaningful word.
Third option: 2, 4, 6, 3, 5, 1→PENCIL, a meaningful word.
Fourth option: 2, 4, 6, 3, 1, 5→PENCLI, not a meaningful word.

Therefore, only the second option forms a meaningful word. Hence, the third option is correct.