If we form a five-letter meaningful word using the 3rd, 6th, 7 th, 9 th and 10 th letters from the left end of the word “FABRICATING”, then what would be the fourth letter from the left end of that meaningful word? If no meaningful word is formed, mark the answer as X. If more than one meaningful word is formed, mark the answer as Z.

To solve this problem, we need to extract specific letters from the word “FABRICATING” based on their positions from the left end, and then determine if we can form a meaningful five-letter word using them.

Let's first list the letters of the word FABRICATING and their corresponding positions from the left end:

1st letter: F
2nd letter: A
3rd letter: B
4th letter: R
5th letter: I
6th letter: C
7th letter: A
8th letter: T
9th letter: I
10th letter: N
11th letter: G

Now, we extract the letters at the specified positions: 3rd, 6th, 7th, 9th, and 10th letters.

3rd letter = B
6th letter = C
7th letter = A
9th letter = I
10th letter = N

The set of extracted letters is: {B, C, A, I, N}.

Next, we check if we can form any meaningful English words using all five of these letters: B, C, A, I, and N (each exactly once).

By rearranging these letters, we find the meaningful word: CABIN.

Let's check if any other meaningful five-letter word can be formed from {B, C, A, I, N}:
No other common, meaningful English word can be formed using this exact combination of letters. Thus, exactly one meaningful word is formed, which is CABIN.

The question asks for the fourth letter from the left end of this meaningful word.

Let's write down the word CABIN and identify the position of each letter from the left end:

1st letter = C
2nd letter = A
3rd letter = B
4th letter = I
5th letter = N

The fourth letter from the left end of the word CABIN is I.

Therefore, the correct answer option is I.