Osteoporosis occurs due to the deficiency of:

Correct option is B

Ans. (b)
Sol. Calcium deficiency is one of the primary causes of osteoporosis, a condition in which bones become weak and brittle. Calcium is essential for maintaining bone density and strength. Lack of adequate calcium over time results in decreased bone mass and increased fracture risk, especially in the elderly and postmenopausal women.
Explanation of each option:
· (a) Phosphorous – Important for bone health, but its deficiency is less commonly linked to osteoporosis.
· (b) Calcium – Correct answer. Essential mineral for bone formation and maintenance.
· (c) Zinc – Needed for immune function and wound healing; not directly responsible for osteoporosis.
· (d) Iron – Important for hemoglobin production; unrelated to bone density.