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
Anti-D gamma globulin following first trimester abortion is - 
Select and explain. 
A. 50mg, B. 100mg, C. 200mg, D. 300mg
A: 50mg
Answer: A: 50mg 
Explanation: Ans-A