## **Core Concept**
Mahler's theory of child development emphasizes the importance of the mother-child relationship, particularly in the early stages. The **symbiotic phase**, a critical period in infant development, is characterized by a close, interdependent relationship between the infant and the caregiver, typically the mother. This phase is essential for the infant's emotional and psychological development.

## **Why the Correct Answer is Right**
The correct answer, **0-2 months**, represents the period during which the infant and mother experience a state of **normal symbiosis**. According to Mahler, this phase is marked by the infant's sense of oneness with the mother, where the infant's needs are immediately responded to, fostering a sense of security and trust. This period is crucial for establishing a healthy attachment and lays the foundation for future developmental stages.

## **Why Each Wrong Option is Incorrect**
- **Option A:** *2-4 months* - This option is incorrect because, although it overlaps with the symbiotic phase, it extends beyond the typically defined period of normal symbiosis.
- **Option B:** *4-6 months* - This option is incorrect as it falls outside the initial symbiotic phase and into the **differentiation phase**, where the infant begins to recognize the mother as a separate entity.
- **Option D:** *6-9 months* - This option is incorrect because it corresponds to a later developmental phase, beyond the initial symbiotic and differentiation phases.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that Mahler's phases of development are critical in understanding **attachment disorders** and the psychological impact of early caregiver-infant interactions. Clinicians should be aware that disruptions during the symbiotic phase can have lasting effects on a child's emotional and psychological well-being.

## **Correct Answer:** . 0-2 months