**Core Concept**
Indian Penal Code (IPC) Section 314 deals with the offense of causing miscarriage, and it's essential to understand the nuances of this section to determine the correct answer. This section is related to the legal aspects of obstetrics and gynecology, particularly in cases where a miscarriage occurs.

**Why the Correct Answer is Right**
The correct answer, **B. Death of patient caused by miscarriage**, is chosen because IPC Section 314 specifically deals with the offense of causing death due to miscarriage. This section is enacted to prevent and punish individuals who cause the death of a pregnant woman due to miscarriage. The section is not concerned with the death of the fetus (child) or the consent of the pregnant woman. The section aims to protect the life of the pregnant woman, making option B the correct choice.

**Why Each Wrong Option is Incorrect**
**Option A:** Causing miscarriage with consent is actually dealt with under IPC Section 312, which is a separate offense.
**Option C:** Death of child during miscarriage is not the primary focus of IPC Section 314; the section is more concerned with the death of the pregnant woman.
**Option D:** Abandoning the child is not related to IPC Section 314, which specifically deals with causing death due to miscarriage.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that IPC Section 314 is a critical section in forensic medicine, and understanding its nuances can help you navigate complex cases involving miscarriage and maternal mortality.

**✓ Correct Answer: B. Death of patient caused by miscarriage**