**Core Concept**
The criminal responsibility of insane individuals is a complex issue that involves evaluating the defendant's mental state at the time of the crime. This concept is crucial in forensic medicine, as it determines whether a person can be held accountable for their actions. The principles guiding this evaluation are rooted in various rules and guidelines, each with its own set of criteria.

**Why the Correct Answer is Right**
The correct answer, "Resp ispa loquitar," is not a recognized rule related to the criminal responsibility of insane individuals. The term is actually a Latin phrase that means "speech is the response of the tongue." It is not relevant to the evaluation of criminal responsibility in forensic medicine. In contrast, the other options are all well-established rules used to assess the mental state of defendants.

**Why Each Wrong Option is Incorrect**
**Option A:** Currens rule is not a widely recognized rule in forensic medicine. While there is a "Currens v. United States" case (1953) related to insanity, it is not a standard rule used to evaluate criminal responsibility.
**Option B:** The Durham rule, also known as the "product test," is a rule used in some jurisdictions to determine whether a defendant was insane at the time of the crime. It states that an accused is not criminally responsible if their unlawful act was the product of a mental disease or defect.
**Option C:** The M'Naghten rule, also spelled as "McNaughten rule," is a well-established standard used to evaluate the criminal responsibility of insane individuals. It requires that the defendant did not know the nature and quality of their actions or did not know what they were doing was wrong due to a mental disease or defect.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the assessment of criminal responsibility in forensic medicine involves a nuanced evaluation of the defendant's mental state, taking into account various factors, including their ability to understand the nature and quality of their actions, their ability to conform their conduct to the requirements of the law, and the presence of any mental disease or defect.

**✓ Correct Answer: D. Resp ispa loquitar**