Deficiency of vitamin ‘X’ causes bleeding of gums. This vitamin is essential for absorption of mineral ‘Y’ and ‘X’ is found in food ‘Z’. Identify X, Y and Z.

The correct option is X-vitamin C, Y-iron, Z-citrus fruits.

Let us analyze the functions and sources of the vitamin and mineral mentioned in the question step-by-step:

1. Identification of Vitamin 'X':
Deficiency of Vitamin C (ascorbic acid) causes scurvy, a disease characterized by bleeding gums, skin spots, and poor wound healing. Therefore, X is Vitamin C.

2. Identification of Mineral 'Y':
Vitamin C plays a crucial role in enhancing the absorption of non-heme iron in the human gastrointestinal tract. Therefore, Y is iron.

3. Identification of Food Source 'Z':
Citrus fruits such as oranges, lemons, and amla (Indian gooseberry) are rich sources of Vitamin C. Therefore, Z is citrus fruits.

Combining all three identifications:
X: Vitamin C
Y: Iron
Z: Citrus fruits