Correct option is C
The first foetal movements, known as "quickening," are typically felt by the mother between 16 to 18 weeks of gestational age, especially in first-time pregnancies. In subsequent pregnancies, women might feel movements a bit earlier around 14-16 weeks. Explanation for each option: (a) 10-12 weeks: Incorrect. At this stage, foetal movements are too subtle and not usually perceptible to the mother. (b) 12-16 weeks: Incorrect. Movements can start becoming stronger but are generally not felt reliably until after 16 weeks. (c) 16-18 weeks: Correct. Most primigravida women perceive first foetal movements between 16 and 18 weeks. (d) 18-22 weeks: Incorrect. While some may feel movements till 18-20 weeks, the average is around 16-18 weeks.