The blood cells involved in the process of oxygen transport are

1. lymphocytes
2. monocytes
3. erythrocytes
4. thrombocytes

Assertion (A): Hypersecretion of adrenal cortex causes Cushing's syndrome.

Reason (R): Symptoms of Cushing's syndrome are obesity, hyperglycemia, weakness, osteoporosis, salt and water retention.

1. Both A and R are true
2. Both A and R are false
3. A is true and R is false
4. A is false and R is true

Prakash is a resident of hilly region where iodine is deficient in soil and hence in the food grown there. He started developing swelling in the neck. This was due to

1. simple goitre
2. cretinism
3. myxoedema
4. exophthalmic goitre

The condition affecting the older people who cannot see nearby objects clearly is called

1. presbyopia
2. cataract
3. astigmatism
4. hyperopia