Which of the following statements `is//are` correct?
a. Electric field calculated by Gauss law is the field due to only those charges which are enclosed inside the Gaussian surface.
b. Gauss law is applicable only when there is a symmetrical distribution of charge.
c. Electric flux through a closed surface is equal to total flux due to all the charges enclosed within that surface only.

Explanation

To determine which statements are correct regarding Gauss's law and electric fields, let's analyze each statement one by one.

### Step 1: Analyze Statement A
**Statement A:** "Electric field calculated by Gauss law is the field due to only those charges which are enclosed inside the Gaussian surface."

**Analysis:**
Gauss's law states that the electric flux through a closed surface is proportional to the charge enclosed within that surface. However, the electric field at a point can be influenced by both enclosed charges and external charges. Therefore, the electric field calculated using Gauss's law is not limited to just the charges inside the Gaussian surface.

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