This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid, Subject name: Surgery
Which of the following is a symptom of hypothyroidism? 
Select and explain. 
A. Hyperactivity, B. Palpitation, C. Diarrhoea, D. Hair loss
D: Hair loss
Answer: D: Hair loss 
Explanation: First 3 are features of hypehyroidism ; alopecia is the feature of hypothyroidism.