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
Langerhans cells in skin are : 
Select and explain. 
A. Antigen presenting cells, B. Pigment producing cells, C. Keratin synthesisng cells, D. Sensory neurons
A: Antigen presenting cells
Answer: A: Antigen presenting cells 
Explanation: A i.e Antigen presenting cells