**Core Concept**
Cocaine-induced paranoid psychosis is a serious psychiatric condition characterized by the development of paranoid delusions and hallucinations in individuals who use cocaine. This condition is thought to be related to the stimulant effects of cocaine, which can lead to an overactivation of the brain's reward system and a subsequent increase in dopamine levels.

**Why the Correct Answer is Right**
The correct answer is related to the dopamine hypothesis of schizophrenia and cocaine-induced psychosis. Cocaine blocks the reuptake of dopamine, leading to an excessive accumulation of this neurotransmitter in the synaptic cleft. This results in an overactivation of the mesolimbic dopamine system, which is responsible for the regulation of motivation, pleasure, and reward processing. The increased dopamine levels can lead to the development of paranoid delusions and hallucinations, which are characteristic of paranoid psychosis.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to the pathophysiology of cocaine-induced paranoid psychosis.
* **Option B:** While serotonin is involved in various psychiatric conditions, it is not directly related to cocaine-induced paranoid psychosis.
* **Option C:** This option is incorrect because the primary mechanism of cocaine-induced paranoid psychosis is related to dopamine, not norepinephrine.

**Clinical Pearl / High-Yield Fact**
Cocaine-induced paranoid psychosis is a medical emergency that requires immediate treatment. The use of benzodiazepines, such as lorazepam, can help to calm the individual and reduce the risk of harm to themselves and others.

**Correct Answer:** C. Overactivation of the mesolimbic dopamine system.