Precocious puberty may be seen in all of the following conditions except:: (A) Granulosa - cell tumour, (B) Head - injury, (C) Corticosteroid intake, (D) Hyperthyroidism
Answer is D. Hypothyroidism and not hyperthyroidism cause precocious puberty.

In hypothyroidism
     ↓
↑TSH
     ↓
Stimulation of FSH
     ↓
Precocious puberty
If precocious puberty is associated with delayed bone age it suggests primary hypothyroidism