**Core Concept**
IPC 320 refers to voluntarily causing grievous hurt, which is a specific section under the Indian Penal Code (IPC) that deals with causing serious injuries to another person. This section focuses on the intent behind the act, rather than the severity of the injury itself.

**Why the Correct Answer is Right**
To determine whether IPC 320 applies, the intent behind the act must be voluntary, meaning the person causing the grievous hurt did so intentionally. This section does not consider accidental or unintentional injuries. The grievous hurt can range from severe cuts, lacerations, and fractures to internal injuries, such as damage to organs or blood vessels.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because IPC 320 is not related to causing death, which is dealt with under a different section (IPC 302).
**Option B:** This option is incorrect because IPC 320 specifically deals with grievous hurt, not mere hurt, which is covered under a different section (IPC 323).

**Clinical Pearl / High-Yield Fact**
When considering IPC 320, remember that the intent behind the act is crucial in determining whether the injury constitutes grievous hurt. This distinction is essential in distinguishing between voluntary and involuntary acts.

**Correct Answer:** C. Voluntarily causing grievous hurt.