**Core Concept**
The Medical Termination of Pregnancy (MTP) Act is a legislation that governs the conditions under which a pregnancy can be terminated in a medical setting. The Act specifies certain indications for MTP, which are based on the health and well-being of the pregnant woman, the fetus, or both.

**Why the Correct Answer is Right**
The indications for MTP include cases where the continuance of the pregnancy would cause serious risk to the life or physical or mental health of the pregnant woman, or where there is a substantial risk that the child would suffer from such physical or mental disabilities as to be seriously handicapped. This is because the MTP Act prioritizes the health and well-being of both the pregnant woman and the fetus. In cases where the pregnancy is a result of rape, incest, or other forms of violence, MTP is also indicated. The decision to terminate a pregnancy under the MTP Act is typically made by a medical practitioner, taking into account the specific circumstances of the case.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify a valid indication for MTP. While economic hardship may be a factor in a woman's decision to terminate a pregnancy, it is not a valid indication under the MTP Act.

**Option B:** This option is incorrect because it does not accurately reflect the indications for MTP. While some forms of fetal anomalies may be a valid indication for MTP, the MTP Act does not specify that all fetal anomalies are a valid reason for termination.

**Option C:** This option is incorrect because it does not specify a valid indication for MTP. While some forms of maternal mental health issues may be a valid indication for MTP, the MTP Act does not specify that all mental health issues are a valid reason for termination.

**Clinical Pearl / High-Yield Fact**
It is essential for medical practitioners to carefully assess the specific circumstances of each case and to provide counseling and support to women who are considering MTP. The MTP Act also emphasizes the importance of informed consent and the need for women to be fully aware of their options and the potential risks and benefits associated with MTP.

**Correct Answer: D.**