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
Toxicity of Oral Xa inhibitors are treated by 
Select and explain. 
A. Protamine sulphate, B. Andexanet alfa, C. Idarucizumab, D. Argatroban
B: Andexanet alfa
Answer: B: Andexanet alfa 
Explanation: Andexanite alfa is a Xa factor analogue used to treat poisoning of Oral Xa inhibitors like Epixaban, Rivaroxaban.