Decreased level of oestrogen in the human body leads to:

Match List-$I$ with List-$II$ and select the correct option.

List-$I$	List-$II$
$a$. Tetany	$i$. Autoimmune disorder
$b$. Osteoporosis	$ii$. Progressive degeneration of skeletal muscle
$c$. Muscular dystrophy	$iii$. Inflammation of joints
$d$. Arthritis	$iv$. Rapid spasms in muscle
$e$. Myasthenia gravis	$v$. Decreased bone mass

In old age, people often suffer from stiff and inflamed joints. What is this condition called? What are the possible reasons for these symptoms?

In case of severe tetany in muscle,the animal dies due to:

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

Which sentence is true for the disease Tetany?