Question

4. Osteoporosis is mainly the condition of fragile bone that increases the risk of bone breaking; it occurs due to lack of in diet (1) Iron (2) lodine (3) Protein (4) Calcium ​

Answer 1

Answer-(4) Calcium
Explanation-
Osteoporosis causes bones to become weak and brittle — so brittle that a fall or even mild stresses such as bending over or coughing can cause a fracture. Osteoporosis-related fractures most commonly occur in the hip, wrist or spine.

Bone is living tissue that is constantly being broken down and replaced. Osteoporosis occurs when the creation of new bone doesn't keep up with the loss of old bone.