Okay, let's tackle this question about the Oedipus complex. First, I need to recall what the Oedipus complex is. From Freudian theory, it's a concept in psychoanalysis. The question is asking during which stage of psychosexual development it occurs.

The options aren't provided, but the correct answer is supposed to be the phallic stage. Let me think: Freud's stages include oral, anal, phallic, latency, and genital. The Oedipus complex is specifically in the phallic stage, which is around ages 3 to 6. During this stage, the child becomes aware of their gender and develops unconscious desires for the opposite-sex parent. The correct answer should be the phallic stage.

Now, for the incorrect options. If the other options were oral, anal, or genital stages, those would be wrong. The oral stage is about mouth-related activities, anal about toilet training, and genital is the later stage focusing on genitalia. The latency stage is about repression of sexual feelings, so that's not it either.

The core concept here is Freud's psychosexual stages and the Oedipus complex. The clinical pearl is to remember the order of stages and the key developments in each. For the explanation, I need to detail why the phallic stage is correct and why the others are not. Also, mention the age range and the key elements of the Oedipus complex, like castration anxiety in boys and penis envy in girls. Make sure the explanation is concise but covers all necessary points for exam prep.

**Core Concept**
The **Oedipus complex** is a psychoanalytic concept describing unconscious desires in children for the opposite-sex parent, formulated by Sigmund Freud. It occurs during the **phallic stage** (ages 3–6) of psychosexual development, marked by identification with the same-sex parent and castration anxiety in boys or penis envy in girls.

**Why the Correct Answer is Right**
The **phallic stage** (Option C) is the correct answer because this is when Freud proposed the Oedipus complex emerges. During this stage, children develop sexual attraction toward the opposite-sex parent and rivalry with the same-sex parent. Boys experience **castration anxiety**, fearing punishment from the father for desiring the mother, while girls develop **penis envy**, leading to identification with the mother. This stage is pivotal for gender identity formation and superego development.

**Why Each Wrong Option is Incorrect**
**Option A: Oral stage (0–1 year)** – Focuses on sucking and oral gratification; unrelated to the Oedipus complex.
**Option B: Anal stage (1–3 years)** – Centers on toilet training and control, not parental rivalry.
**Option D: Genital stage (puberty onwards)** – Involves mature sexual relationships, not the childhood dynamics of the Oedipus complex.

**Clinical Pearl / High-Yield Fact**
Remember Freud’s stages in order: **O**ral → **A**nal → **P**hallic → **L**atency → **G**enital. The Oedipus complex is exclusive to the **P**hallic stage. Confusing this with the "Oedipal phase" in other stages is a common exam trap.

**Correct Answer

✓ Correct Answer: C. Boys of 3 - 5 years of age