Let’s analyze the statements:

Statement I:
The Supreme Court of India has held in some judgments that reservation policies made under Article 16(4) would be limited by Article 335 to maintain the efficiency of administration.
This is correct. The Supreme Court, in various rulings (such as the Indra Sawhney case), has emphasized that while Article 16(4) provides for reservations in public employment, it must be balanced with Article 335, which states that the claims of Scheduled Castes and Scheduled Tribes must be consistent with maintaining the efficiency of administration.

Statement II:
Article 335 defines the term “efficiency of administration.”
This is incorrect. Article 335 does not define “efficiency of administration.” It only mentions that the claims of Scheduled Castes and Scheduled Tribes should be taken into consideration, consistent with the maintenance of efficiency of administration. However, it does not provide a definition of “efficiency.”

Correct answer:
Statement-I is correct but Statement-II is incorrect

Explanation:

1. If the election of the President of India is declared void by the Supreme Court of India, all acts done by him/her in the performance of duties of his/her office of President before the date of decision become invalid.
   • This statement is incorrect. According to Article 71(2) of the Indian Constitution, if the election of the President is declared void by the Supreme Court, acts performed by him/her before the judgment are not invalidated. They remain valid.
2. Election for the post of the President of India can be postponed on the ground that some Legislative Assemblies have been dissolved and elections are yet to take place.
   • This statement is incorrect. The election for the President of India cannot be postponed due to the dissolution of some Legislative Assemblies. According to Article 62 of the Constitution, the election for the President must be held before the expiration of the current President’s term.
3. When a Bill is presented to the President of India, the Constitution prescribes time limits within which he/she has to declare his/her assent.
   • This statement is incorrect. The Constitution does not prescribe any specific time limits within which the President must act on a Bill. The President can take as long as he/she deems necessary.

Conclusion:

None of the statements are correct. The correct answer is None.

The correct answer is It defines and limits the powers of government.

Explanation: The primary purpose of a constitution is to establish the fundamental framework for governance in a country. It defines the structure of the government, delineates the powers and functions of different institutions, and places limits on governmental power to protect individual rights and maintain the rule of law. While it may also outline the objectives for making laws, create political offices, and aim to secure social justice, its chief purpose is to define and limit the powers of government to prevent abuse and ensure the protection of citizens’ rights.