This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Precocious puberty may be seen in all of the following conditions except: 
Select and explain. 
A. Granulosa - cell tumour, B. Head - injury, C. Corticosteroid intake, D. Hyperthyroidism
D: Hyperthyroidism
Answer: D: Hyperthyroidism 
Explanation: 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