All of the following are the known causes of osteoporosis except :: (A) Fluorosis, (B) Hypogonadism, (C) Hypehyroidism, (D) Hyperparathyroidism
Answer is A. Answer is A (Fluorosis): Fluorosis is associated with `Osteosclerosis' and not with osteoporosis. Hypogonodism, Hypehyrodism and Hyperparathyrodism are all known causes for osteoporosis.