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
[{'content': 'After treatment of ectopic preg with methotrexate, HCG levels checked on_____ \nSelect and explain. \nA. Day 0, day 4, B. Day 4, day7, C. Day 1 and 4, D. Day 1 and 7', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Day 4, day7.# Inj. MTX 50 mg/m2 of body surface area without leucovorin. Beta HCG should be measure on D4 and D7.# Methotrexate can be used for primary treatment of ectopic pregnancy, treatment of persistent ectopic following evacuation. Beta-hCG level is checked every alternate day until beta-hCG level is decreased to 15 percent in 2 consecutive days.', 'role': 'assistant'}]