Which one of the following is not a disorder of bone?

(a) Arthritis

(b) Osteoporosis

(c) Rickets

(d) Atherosclerosis

Q. Which one of the following is not a disorder of bone?

Q. Assertion- An example of age-related disorder characterised by decreased bone mass is osteoporosis
Reason- It is caused due to defect in purine metabolism

Q.

Match the following______

Column I Column II

i. Myasthenia gravis a. Accumulation of uric acid

ii. Osteoarthritis. b. new bone creation doesn't keep up with old bone removal

iii. Gouty arthritis. c. wearing down of the cartilage in older people.

iv. Osteoporosis. d. Autoimmune response to neuromuscular junction

Q. Assertion :The bone disorder called osteoporosis results from the loss of calcium and phosphate from the bone matrix. Reason: In osteoporosis, bone material is destroyed by osteoclasts more quickly than it is laid down by osteoblasts.

Q. Match the following
$\begin{array}{cc}\text{a) Inflammation of the joints}& \text{i) Tetany}\\ \text{b) Wild contraction of the muscles}& \text{ii) Arthritis}\\ \text{c) Decreased bone mass and increased chances of fractures}& \text{iii) Osteoporosis}\end{array}$