The correct option is B (a)−(iii),(b)−(i),(c)−(ii),(d)−(v)
Gout- It is an inflammatory disease which causes inflammation of joints. It is mainly caused by the accumulation of uric acid crystals.
Osteoporosis- It is an age-related disorder characterized by decreased bone mass and increased chances of fractures. Decreased levels of estrogen is a common cause.
Tetany - It is a disorder in which wild contractions or spasms of the muscles take place. This occurs due to the low calcium concentration in the body fluid.
Muscular Dystrophy - It is a disease that involves progressive degeneration of skeletal muscles, mostly due to genetic disorder.
Hence, option b is correct.