Option 1 - A Democratic Republic: This option suggests that the Indian Republic was a democratic system of government when the Constitution came into force in 1950. While democracy is an important characteristic of the Indian Republic, it does not fully capture the constitutional position described in the question.

Option 2 - A Sovereign Democratic Republic: This option correctly describes the constitutional position of the Indian Republic when the Constitution was implemented in 1950. "Sovereign" means that India is independent and not under the control of any external authority. "Democratic" indicates that the government is based on the principles of representative democracy, where people elect their leaders. "Republic" means that the head of state is an elected individual, not a hereditary monarch.

Option 3 - A Sovereign Secular Democratic Republic: This option suggests that, in addition to being sovereign and democratic, the Indian Republic is also secular. Secularism means that the state does not favor any particular religion and treats all religions equally. While India does have secular principles, it is not explicitly mentioned in the constitution as it was added later through amendments.

Option 4 - A Sovereign Secular Socialist Democratic Republic: This option suggests that, in addition to the characteristics mentioned in option 3, the Indian Republic is