Assertion: Thyroid hormones promote physical growth and development of mental faculties.
Reason: Hypothyroidism in adults causes retarded sexual development.

Answer

B

Explanation

Thyroid hormones stimulate protein synthesis and, therefore, promote growth of the body tissues (physicaldevelopment).They also regulate the development of mental faculties. Hyperthyroidsm in adults causes myxoedema. This disease is characterised by puffy appearance due to accumulation of fat in the subcutaneous tissue because of low metabolic rate. The patient lacks alertness, intelligence and intiative He also suffers from slow heart beat, lwo body temperature and retarded sexual development.