Correct Answer - Option 3 : zero charge

__Concept:__

**Basic Properties of charge:**

- Charges are additive in nature
- The charge is conserved Quantity
- Quantization of Electric Charge

**Additivity of Electric Charge**

- Consider a system of charges consists of ‘n’ point charges with magnitude q
_{1}, q_{2},……q_{n}. In such a system, the total charge of the system can be obtained by algebraically adding the three charges.
- These charges have the only magnitude but no direction,
**it is scalar quantities**, and are treated like real numbers during operation.
- We note that the charge can either be positive or negative and the operation takes the sign of the charge into consideration.
- For a system containing
**‘n’** number of a point charge, the total charge **(Q)** of the system can be written as,

Q = q_{1} ± q_{2} ± ………± q_{n}

**Conservation of Electric Charge**

- According to the principle of conservation of charges, the charges are neither created nor destroyed, they are only transferred from one body to the other.

**Quantization of Electric Charge**

- According to the principle of quantization of electric charge, all the free charges are integral multiples of a basic predefined unit which we denote by
**e**.
- Thus, the charge possessed by a system can be given as
**Q = ne**

Where n is an integer value

And e is the charge on electron or proton given by, **± 1.6 × 10**^{-19}C

__Calculation:__

Given, Number of Proton = Number of Electron

Positive charge = Negative charge

∴ **Total charge = 0**