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: Unknown
Which of the following is a function of cells Labelled A ? 
Select and explain. 
A. Secretion of FSH into the tubular lumen, B. Secretion of testosterone into the tubular lumen, C. Maintenance of the blood-testis barrier, D. Synthesis of estrogen after puberty
C: Maintenance of the blood-testis barrier
Answer: C: Maintenance of the blood-testis barrier 
Explanation: Of course If you focus on the Picture without reading the options you cannot guess the Structure…So
Whenever you are not sure about the HISTOLOGY Picture, read the options and almost 99% you can get to know the structure
Picture : Structure of Seminiferous tubule