**Core Concept**
Schizophrenia is classified under the ICD-10 as a psychotic disorder, specifically falling under the category of mental and behavioral disorders. The F2 category in ICD-10 encompasses psychotic disorders, including schizophrenia, schizoaffective disorder, and other related conditions.

**Why the Correct Answer is Right**
F2 in the ICD-10 system is designated for "Psychotic disorders." Schizophrenia is a primary psychotic disorder characterized by persistent hallucinations, delusions, disorganized thinking, and cognitive impairments. It is specifically coded under F2, which includes schizophrenia (F20.0–F29.9). This classification is based on diagnostic criteria from the DSM-5 and ICD-10, aligning with global clinical standards.

**Why Each Wrong Option is Incorrect**
Option A: F0 refers to "Neurodevelopmental disorders" such as autism and intellectual disability, not schizophrenia.
Option B: F1 refers to "Substance-related and addictive disorders," including alcohol and drug use disorders.
Option D: F3 refers to "Mood disorders," such as depression and bipolar disorder, which are not related to psychotic symptoms like schizophrenia.

**Clinical Pearl / High-Yield Fact**
Remember: F2 = Psychotic disorders. If a patient has hallucinations, delusions, or disorganized behavior without mood symptoms, think schizophrenia — code it under F2. This is a key diagnostic anchor in psychiatric coding.

✓ Correct Answer: C. F2