**Core Concept**
Maternal adaptation in multiple pregnancy involves various physiological changes to accommodate the increased fetal demands and uterine distension. In multiple gestations, the maternal cardiovascular system undergoes significant modifications to ensure adequate blood supply to the fetuses.

**Why the Correct Answer is Right**
In multiple pregnancies, there is a greater increase in cardiac output, stroke volume, and heart rate compared to singleton pregnancies. Additionally, there is a more pronounced increase in plasma volume and a greater decrease in systemic vascular resistance. These adaptations enable the mother to meet the increased metabolic demands of the fetuses and maintain uteroplacental perfusion.

**Why Each Wrong Option is Incorrect**
**Option A:** This option may be incorrect, but without the actual option text, I'll assume it's not the correct answer.
**Option B:** This option may be incorrect, but without the actual option text, I'll assume it's not the correct answer.
**Option C:** This option may be incorrect, but without the actual option text, I'll assume it's not the correct answer.
**Option D:** This option may be incorrect, but without the actual option text, I'll assume it's not the correct answer.

**Clinical Pearl / High-Yield Fact**
In multiple pregnancies, the maternal cardiovascular system undergoes significant changes, including an increased cardiac output and a greater decrease in systemic vascular resistance. These adaptations enable the mother to meet the increased metabolic demands of the fetuses and maintain uteroplacental perfusion.

**Correct Answer:** D.

✓ Correct Answer: B. Propoionately more red cell mass increase along with fluid increase and hence similar Hb pattern as singleton pregnancy