Osteoporosis is a condition in which the bones become weak and break easily.

• A. Arthritis
• B. Osteomalacia
• C. Osteoporosis
• D. Rickets

Answer: (C)

Weak, brittle bones that break easily point to osteoporosis. This condition involves a loss of bone density and deterioration of bone structure, so bones become porous and fracture-prone even with minor stress. It’s different from arthritis, which is inflammation of the joints and causes pain and stiffness rather than a primary problem with bone strength. It’s also distinct from osteomalacia, where bones are poorly mineralized and softened due to vitamin D deficiency, and from rickets, which is the same mineralization problem in children leading to bone deformities. So the best match for “bones become weak and break easily” is osteoporosis.