**Core Concept**
The legal responsibilities of an intoxicated person are governed by the Indian Penal Code (IPC), which outlines the circumstances under which an individual can be held liable for their actions while under the influence of alcohol. This concept is crucial in forensic medicine, as it helps determine the culpability of individuals in cases involving intoxication.

**Why the Correct Answer is Right**
Section 85 of the IPC specifically deals with the act of a person incapable of judgment by reason of intoxication caused against his will. This section is relevant to cases where an individual is found to be intoxicated due to external factors, such as being forced to consume alcohol, and is subsequently involved in a crime. The section aims to protect individuals who are not fully responsible for their actions due to intoxication caused against their will.

**Why Each Wrong Option is Incorrect**
**Option A:** Section 82 of the IPC deals with the act of a person of unsound mind, which is a separate concept from intoxication.
**Option B:** Section 83 of the IPC is not directly related to the legal responsibilities of an intoxicated person.
**Option C:** Section 84 of the IPC deals with the act of a person who, at the time of committing an offense, was, by reason of unsoundness of mind, incapable of knowing the nature of the act, or that he was doing what was either wrong or contrary to law. This section is not specifically related to intoxication.

**Clinical Pearl / High-Yield Fact**
It is essential to note that the IPC specifically distinguishes between voluntary and involuntary intoxication, as outlined in sections 85 and 86, respectively. This distinction is crucial in determining the culpability of individuals in cases involving intoxication.

**✓ Correct Answer: D. 85**