**Core Concept**
Paranoid psychosis with cocaine is a manifestation of cocaine-induced psychosis, which is a well-documented side effect of chronic cocaine use. This phenomenon is primarily linked to the stimulant's effects on the central nervous system, particularly its interaction with dopamine and serotonin pathways.

**Why the Correct Answer is Right**
Cocaine-induced psychosis is thought to arise from the blockade of dopamine and serotonin reuptake in the brain, leading to an excessive release of these neurotransmitters. This results in an overstimulation of the mesolimbic dopamine system, which is responsible for regulating reward, motivation, and emotional responses. The increased dopamine levels trigger the development of psychotic symptoms, including hallucinations, delusions, and paranoid thinking. The blockade of serotonin reuptake also contributes to the exacerbation of these symptoms.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the mechanism behind cocaine-induced psychosis. While dopamine is indeed involved, the specific role of GABA receptors is not directly related to the development of paranoid psychosis.

**Option B:** This option is incorrect because it misidentifies the neurotransmitter primarily involved in cocaine-induced psychosis. While serotonin is affected, it is not the primary culprit behind the development of paranoid psychosis.

**Option C:** This option is incorrect because it does not accurately describe the pathophysiology of cocaine-induced psychosis. The term "dopamine dysregulation" is too broad and does not specifically address the mechanisms underlying paranoid psychosis.

**Clinical Pearl / High-Yield Fact**
It's essential to note that cocaine-induced psychosis can mimic other psychiatric conditions, such as schizophrenia, making it crucial for clinicians to consider substance use as a potential contributing factor in patients presenting with psychotic symptoms.

**Correct Answer:** B.