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: Microbiology
Mycobacterium scrofulaceum which cause scrofula, belongs to which groups of atypical mycobacteria - 
Select and explain. 
A. Photochromogens, B. Scotochromogens, C. Non-photochromogens, D. Rapid growers
B: Scotochromogens
Answer: B: Scotochromogens 
Explanation: Ans. is 'b' i.e., Scotochromogens