IBPS PO Prelims 20 Oct 2024 Shift 2 Paper

If it is possible to make a meaningful word from the second, third, sixth and seventh letters of the word "FOUNDATION", then which of the following letter is the first letter of that word? If more than one such word can be made, then give "X" as the answer, and if no such word can be formed then give "Z" as the answer.