**Question:** True about corpus callosum -
a) Unite far area of two sides of brain
b) Connect two frontal lobes
c) Unite two hemispheres
d) Superiorly related to Indusium griseum

**Core Concept:**
The corpus callosum is a band of nerve fibers that connects the two cerebral hemispheres of the brain, allowing communication between them. It plays a crucial role in integrating sensory, motor, and cognitive functions. The corpus callosum is divided into several regions based on its location and function.

**Why the Correct Answer is Right:**
Correct Answer C - "Unite two hemispheres" accurately describes the primary function of the corpus callosum. It connects the two cerebral hemispheres, allowing information exchange between them, thereby facilitating integration of sensory, motor, and cognitive functions.

**Why Each Wrong Option is Incorrect:**
Option A - "Unite far area of two sides of brain": This statement is inaccurate as the corpus callosum primarily connects the two hemispheres, not distant areas within each hemisphere.

Option B - "Connect two frontal lobes": While the corpus callosum does connect the frontal lobes, it is not limited to just these regions. It connects various areas of both hemispheres, integrating information and facilitating coordination.

Option D - "Superiorly related to Indusium griseum": Indusium griseum is not a known term in medical terminology. The correct structure is the "insula", a part of the limbic system located superiorly in the inner surface of the lateral sulcus. However, the correct answer should be about the corpus callosum, not the insula.

**Correct Answer Explanation:**
The correct answer is C, "Unite two hemispheres," as it accurately describes the primary function of the corpus callosum. This region plays a vital role in integrating information between both hemispheres, enabling coordinated brain functions.

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**Why the Correct Answer is Right:**
The corpus callosum is a crucial part of the brain's neural connections. Its primary function is to integrate information between the two cerebral hemispheres. By doing so, it facilitates the coordination and integration of sensory, motor, and cognitive processes.

**Why Each Wrong Option is Incorrect:**
Option A is incorrect because the corpus callosum does not exclusively integrate distant areas within each hemisphere. Its primary role is to unite the information from both hemispheres.

Option B is incorrect because the corpus callosum connects various areas within both hemispheres, not just the frontal lobes. Its function is to integrate information across the entire brain, not just specific regions.

Option D is incorrect because the term "Indusium griseum" is not a recognized part of medical terminology. The correct structure is the "insula," a part of the limbic system located superiorly in the inner surface of the lateral sulcus. However, the question focuses on the corpus callosum, not the insula.

**Clinical Pearls:**
The corpus callosum is crucial for the coordination and integration of various brain