The correct answer is option 4: Sovereign socialist secular democratic republic.

Let`s break down the components of the answer for better understanding:

1. Sovereign - This means that India is an independent nation and has the authority to govern itself without interference from any external power.

2. Socialist - India follows a socialist ideology, which means that there is a focus on equitable distribution of wealth, social welfare, and reducing economic inequality.

3. Secular - India is a secular country, which means that it does not promote any specific religion and all religions are treated equally under the law.

4. Democratic - India is a democratic country where the power lies with the people. The citizens have the right to vote and elect their representatives in the government.

So, the correct answer, option 4, describes India as a independent nation (sovereign) that follows socialist principles, promotes secularism, and has a democratic form of government.