Correct option is A
According to the WHO focused antenatal care model, at least 4 antenatal visits are recommended for a healthy pregnant woman during the course of pregnancy to ensure proper monitoring, early detection of complications, and timely interventions. Explanation for each option: (a) 4: Correct. WHO recommends a minimum of 4 antenatal care visits to ensure maternal and fetal well-being. (b) 6: Incorrect. Although beneficial, six visits are not the minimum; four is the standard minimum recommended. (c) 5: Incorrect. Five visits may occur in practice but the minimum recommended standard is four according to focused antenatal care. (d) 3: Incorrect. Three visits are considered inadequate for monitoring a normal pregnancy and detecting complications early.