Final answer:
RhoGAM is administered at 28 weeks of gestation and within 72 hours after delivery of an Rh-positive baby. The correct dosage is 300 mcg, and the correct timeframe is within 48 hours.
Step-by-step explanation:
RhoGAM is administered at 28 weeks of gestation and within 72 hours after delivery of an Rh-positive baby. The correct dosage of RhoGAM is 300 mcg. Therefore, option (d) 200 mcg; 72 hours is incorrect. Thus, the correct answer is option (c) 300 mcg; 48 hours.