If a meaningful word is formed using the second, fifth, sixth, and twelfth letters (from the left end) of the word “CHOCOLATEBOY”, which of the following will be the second letter from the left end of the meaningful word formed? If more than one such word can be formed, mark Z as your answer. If no meaningful word is formed, mark X as your answer.

The correct option is O.

Let's find the letters from the word “CHOCOLATEBOY” according to their positions from the left end:
1st letter = C
2nd letter = H
3rd letter = O
4th letter = C
5th letter = O
6th letter = L
7th letter = A
8th letter = T
9th letter = E
10th letter = B
11th letter = O
12th letter = Y

The specified letters are:
- 2nd letter: H
- 5th letter: O
- 6th letter: L
- 12th letter: Y

Using the letters H, O, L, and Y, the meaningful English word that can be formed is HOLY.

In the word HOLY:
- 1st letter from the left end = H
- 2nd letter from the left end = O

Therefore, the second letter from the left end of the meaningful word formed is O.