## Core Concept
Bidextrous grasp, also known as bilateral grasp or two-handed grasp, is a developmental milestone that reflects the integration of both hands for a task, often seen in infants. This skill is an important indicator of fine motor development and hand function.

## Why the Correct Answer is Right
The bidextrous grasp typically appears around 5-6 months of age. At this stage, infants begin to demonstrate the ability to use both hands together for tasks such as holding objects. This developmental milestone is crucial for further fine motor skills development.

## Why Each Wrong Option is Incorrect
- **Option A:** This option suggests an earlier age, which is not typically associated with the development of bidextrous grasp. Earlier milestones include bringing hands to midline and holding toys.
- **Option B:** This option suggests a slightly later age but is not the correct answer based on typical developmental timelines.
- **Option D:** This option suggests a significantly later age, which is beyond the typical range for the emergence of bidextrous grasp.

## Clinical Pearl / High-Yield Fact
A key point to remember is that developmental milestones serve as guidelines, and there can be variation among infants. However, significant delays in achieving milestones such as bidextrous grasp may indicate a need for further evaluation for potential developmental issues.

**Correct Answer: C. 5-6 months.**