A gland which is well-developed in newbo...

A gland which is well-developed in newborn child and reduces continuously from adulthood to old age is .....

thyroid gland

parathyroid gland

thymus

gonads

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Which of the following are concerned with thymus gland? I. It is well-developed in new borns but reduces from adulthood to old age after sexual maturity. II. It is located in the posterior portion of the root of the third ventricle. III. It secretes hormone thymosin, which promotes immune competence in young T-lymphocytes. IV. It functions as biological clock. Choose the correct option.

I, II and III

II, III and IV

II and IV

I and III

Alary

Biceps

Gastroconemius

Pectoralis major

Atary

Biceps

Gastrocnemius

Pectoralis major