**Core Concept**
The Medical Termination of Pregnancy (MTP) act governs the legality of abortion in many countries, including the stipulated gestational age limit. **Gestational age** is a critical factor in determining the legality and method of termination. The MTP act aims to balance the rights of the mother with the ethical considerations of fetal development.

**Why the Correct Answer is Right**
The correct answer is based on the legal framework that allows for the termination of pregnancy up to a certain gestational age, typically to protect the mother's health or in cases of fetal anomalies. In many jurisdictions, this limit is set at **20 weeks of gestation**, beyond which termination is only allowed under exceptional circumstances.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not align with the standard legal gestational age limit for MTP.
**Option B:** Similarly, this option does not match the commonly accepted gestational age limit.
**Option D:** This option exceeds the typical legal limit for elective MTP without special considerations.

**Clinical Pearl / High-Yield Fact**
It's crucial to remember that laws regarding MTP vary significantly between countries and even regions within countries. The **20-week limit** is a common threshold but can change based on legal amendments and specific circumstances such as fetal anomalies or risk to the mother's life.

**Correct Answer:** C. 20 weeks