Okay, let's tackle this question about the Oedipus complex. The user provided the question but didn't fill in the options, so I need to figure out what the correct answer is and explain it properly.

First, the core concept here is psychosexual development in Freudian theory. The Oedipus complex is a key part of Freud's stages, specifically the phallic stage. I remember that this stage occurs around age 3 to 5 years. During this time, a child develops unconscious desires for the opposite-sex parent and feelings of rivalry with the same-sex parent. The correct answer should be the age range corresponding to this stage.

Now, why is the correct answer right? The Oedipus complex is central to Freud's theory, where the phallic stage is when children become aware of their genitals and start exploring their bodies. The complex is named after the Greek myth where Oedipus kills his father and marries his mother. The resolution of this complex involves identification with the same-sex parent and internalization of societal norms, leading to the development of the superego.

For the incorrect options, if the choices included other age ranges like infancy (oral stage), latency period, or adolescence, those would be wrong. For example, the oral stage is 0-1 years, anal stage 1-3, phallic (Oedipus) 3-5, latency 5-12, and genital stage in adolescence. So any option not 3-5 would be incorrect.

Clinical pearl: Remembering Freud's stages by their order and key features. The Oedipus complex is crucial for developing the superego, and unresolved conflicts here can lead to later psychological issues. A mnemonic could be "Oedipus is Old (3-5) and has a Phallic stage."

Putting it all together, the correct answer is the age range of 3-5 years, which corresponds to the phallic stage in Freud's theory. The explanation needs to cover the core concept, why the correct answer is right, why others are wrong, and a high-yield fact. I need to make sure the explanation is concise, uses correct terminology, and fits within the character limit. Also, check that each section is properly labeled and formatted in markdown without markdown in the thinking process.

**Core Concept**
The Oedipus complex is a key concept in **Freudian psychosexual development**, occurring during the **phallic stage** (ages 3–5 years). It involves unconscious desires for the opposite-sex parent and rivalry with the same-sex parent, central to the formation of the **superego**.

**Why the Correct Answer is Right**
The phallic stage (3–5 years) is when children develop **genital awareness** and **symbolic play**. Boys experience the Oedipus complex, while girls develop the **Electra complex**. Resolution occurs through **identification with the same-sex parent**, internalizing societal norms and forming the superego. This stage is critical for **gender identity** and **moral development**.

**Why Each Wrong Option is Incorrect**
**Option A:** (e.g., 0–1 years) – This corresponds to the **oral stage**, focused on sucking and oral gratification.
**Option B:** (e.g., 1–

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