This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnosis of Pregnancy, Subject name: Gynaecology & Obstetrics
A 22 year old woman just completed her first trimester of pregnancy. By what time should she feel her first fetal movements:- 
Select and explain. 
A. 12-16 weeks, B. 16-20 weeks, C. 26 - 28 weeks, D. 28-32 weeks
B: 16-20 weeks
Answer: B: 16-20 weeks 
Explanation: Quickening is perception of fetal movements by the pregnant lady. Primigravida - Quickening occurs at 18 - 20 weeks Multigravida - Quickening occurs at 16 - 18 weeks