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: Physiology
A patient with an endocrine abnormality shows 'hung up' reflex. Which of the following condition causes 'hung up' reflex? 
Select and explain. 
A. Myxedema, B. Hypehyroidism, C. Hypothyroidism, D. Pheochromocytoma
C: Hypothyroidism
Answer: C: Hypothyroidism 
Explanation: A prolonged relaxation phase of a deep tendon reflex causing a "hung up" reflex, especially of the ankle jerk, is a classical finding of hypothyroidism (Woltman's sign), but is not specific for it. Hung-up reflexes can also be seen in diabetes, hypothermia, and in the presence of ceain drugs. The reflexes return to normal with treatment. Ref: Bauer D.C., McPhee S.J. (2010). Chapter 20. Thyroid Disease. In S.J. McPhee, G.D. Hammer (Eds), Pathophysiology of Disease, 6e.