Deposition of . . . . . . in the joints causes gout.

$A$: Inflammation of a skeletal joint may immobilize the movements of the joint.
$R$: Uric acid crystals in the joint cavity and ossification of articular cartilage lead to this.

Osteoporosis,an age-related disease of the skeletal system,may occur due to:

Which of the following muscular disorders is inherited?

Deficiency of which vitamin causes bow-leggedness in children?

Muscular dystrophy in humans is a