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: Skin
Whitening of the nail plates may be due to deficiency of: March 2011 
Select and explain. 
A. Iron, B. Zinc, C. Albumin, D. Copper
C: Albumin
Answer: C: Albumin 
Explanation: Ans. C: Albumin Leuconychia: Nails are white and are associated with hypoalbuminemia like cirrhosis of liver Nails and dermatology: Mees lines: Arsenic poisoning Oncholysis: Psoriasis Koilonychia: Iron deficiency anemia Koenens periungal fibroma: Tuberous sclerosis