This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of skin, Subject name: Dental
Patchy hair loss with hyperhidrosis of skin points to the diagnosis of - 
Select and explain. 
A. Alopecia aereata, B. Trichotillomania, C. Hypehyroidism, D. Adenoma sebacium
C: Hypehyroidism
Answer: C: Hypehyroidism 
Explanation: hypehyroidism Cutaneous manifestation:Fine velvety smooth skinWarm and moist skin due to increased sweating Localised/generalised hyperpigmentationPruritusFacial flush Palmar erythema, uicaria Pretibial myxoedema Thyroid acropachy. Hair changes:-fine thin hair, non scarring alopecia, alopecia areata. Ref Harrison20th edition pg 1203