**Core Concept**
The pH of amniotic fluid is a critical indicator of fetal well-being. Amniotic fluid is a clear, slightly alkaline liquid that surrounds the fetus in the uterus, playing a vital role in fetal development and protection. The pH of amniotic fluid is regulated by the balance of fetal and maternal waste products.

**Why the Correct Answer is Right**
The pH of amniotic fluid is usually slightly alkaline, ranging from 7.05 to 7.30. This narrow pH range is essential for maintaining the proper functioning of the fetal kidneys and the overall health of the fetus. The alkalinity of amniotic fluid is primarily due to the presence of bicarbonate ions (HCO3-), which are produced by the fetal kidneys and the placenta. The bicarbonate ions help to maintain the pH of amniotic fluid by buffering excess hydrogen ions (H+).

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the pH of amniotic fluid is not acidic. An acidic pH would indicate fetal distress or other complications.
* **Option B:** This option is incorrect because the pH of amniotic fluid is not neutral. A neutral pH of 7.0 would indicate a lack of buffering capacity, which is not typical of amniotic fluid.
* **Option C:** This option is incorrect because the pH of amniotic fluid is not basic. A basic pH above 7.3 would indicate an imbalance in the buffering system, which could be harmful to the fetus.

**Clinical Pearl / High-Yield Fact**
A pH below 7.05 or above 7.30 in amniotic fluid can indicate fetal distress or other complications, such as infection or placental abruption. Monitoring the pH of amniotic fluid is an essential part of prenatal care and can help identify potential issues before they become severe.

**Correct Answer:** C. 7.15