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: Pharmacology
Which of the following is a component of slow reacting substance of anaphylaxis (SRS–A) ? 
Select and explain. 
A. LTC4, B. LTB4, C. Misoprostol, D. Prostacyclin
A: LTC4
Answer: A: LTC4 
Explanation: None