This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Dermatitis, Subject name: Dental
Seborrhoeic dermatitis is frequently seen in - 
Select and explain. 
A. Lipid storage disorders, B. Psoriasis vulgaris, C. Hypeension, D. Parkinson's disease
D: Parkinson's disease
Answer: D: Parkinson's disease 
Explanation: parkinsons disease patients tend to have seborrhoea and seborrheic dermatitis. increase sebum level will cause growth of malassezia and aggravate seborrheic dermatitis. elevated alpha melanocyte stimulating hormone will produce more sebum in these patients. IADVL textbook of dermatology, page 496.