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: Dental
A 6-month-old infant presented with multiple papules & exudative lesions on the face, scalp, trunk and few vesicles on palms and soles for 2 weeks. His mother has h/0 itchy lesions. The most likely diagnosis is – 
Select and explain. 
A. Scabies, B. Infantile exzema, C. Infantile sebornheic dermatitis, D. Impetigo contagiosa
A: Scabies
Answer: A: Scabies 
Explanation: This Infant has:-


Papules & exudative lesions on face, scalp, trunk
Vesicles on Palms & soles
H/o of involvement of mother (Itchy lesions in mother).


This infant has papulo-vesicular lesions.

Two most important diseases which cause papulovesicular lesions in the infant are:-

Atopic dermatitis
Scabies

But, in atopic dermatitis palms & soles are not involved.So, this infant is suffering from scabies