**Core Concept**
The question pertains to the legal implications of a mother concealing the birth of a stillborn child, specifically the relevant sections of the Indian Penal Code (IPC) that govern this offense. This scenario involves the intersection of forensic medicine and law, requiring an understanding of legal terminology and definitions.

**Why the Correct Answer is Right**
The correct answer is incorrect because the specific section of the IPC that defines the act of concealing the birth of a stillborn child is not provided. The correct section is actually Section 318 of the IPC, which deals with concealment of birth by secret disposal of a dead body. This section is crucial in forensic medicine, as it helps investigators and medical professionals determine the cause and circumstances surrounding a death.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the maximum punishment for concealing the birth of a stillborn child is not limited to 2 years. According to Section 318 of the IPC, the punishment can extend up to 2 years, but this option is too restrictive and does not accurately reflect the legal consequences.

**Option B:** This option is incorrect because the punishment for the act done by A is indeed defined under Section 318 of the IPC, not a different section.

**Option C:** This option is incorrect because A is indeed guilty of an offense, specifically the concealment of birth of a stillborn child, as defined under Section 318 of the IPC.

**Clinical Pearl / High-Yield Fact**
It is essential for medical professionals to be aware of the legal implications of their actions, particularly in cases involving the disposal of dead bodies. Section 318 of the IPC serves as a critical reference point in forensic medicine, highlighting the importance of accurate documentation and reporting of births and deaths.

**Correct Answer Line**
✓ Correct Answer: D. The act done by A is defined under Section of IPC