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
Which of the following regarding chlamydia trachomatis is true -a) Gram negativeb) Susceptible to pencillinsc) Cause infertility d) Transmitted parenterally 
Select and explain. 
A. ac, B. bc, C. ad, D. b
A: ac
Answer: A: ac 
Explanation: None