According to Spetzler main grading system for AV malformation the score of AV malformation of size 3-6 mm with deep venous drainage and location near internal capsule is

**Core Concept**
The Spetzler-Martin grading system is a widely used clinical classification tool for Arteriovenous Malformations (AVMs) to predict the risk of surgical intervention. This system considers the size of the AVM, its location, and the presence of deep venous drainage.

**Why the Correct Answer is Right**
The Spetzler-Martin score is calculated based on the AVM's size, location, and venous drainage. AVMs with a size between 3-6 mm, located near the internal capsule, and with deep venous drainage have a specific score. This score is crucial in determining the surgical approach and the potential risks associated with the procedure.

* The size of the AVM (3-6 mm) contributes to the score.
* The location near the internal capsule is another factor in the scoring system.
* Deep venous drainage also plays a significant role in determining the Spetzler-Martin score.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a valid choice as it is incomplete.
**Option B:** This option is not the correct answer as it does not accurately reflect the Spetzler-Martin grading system.
**Option D:** This option is not the correct answer as it does not match the specific characteristics of the AVM mentioned in the question.

**Clinical Pearl / High-Yield Fact**
Remember that the Spetzler-Martin grading system is crucial in determining the surgical approach for AVMs. The score helps predict the risk of surgical intervention and guides the selection of appropriate treatment options.

**Correct Answer:** C.