1. According to Section 2 of the Antiquities and Art Treasures Act, 1972, 'antiquities' include 'any manuscript, inscription or another document which is scientific, historical, literary or aesthetic and which is in existence for not less than 75 years '

2. Thus, any artefact that has been in existence for at least 75 years is considered an antiquity in India.

3. Antiquities are considered an important part of the cultural heritage of India and there are legal provisions for their protection.

(a) Union of States: This means that India is a federation comprising states and union territories. It emphasizes the unity of the country while recognizing the diversity and autonomy of its states.

(b) Federal State with Unitary Features: India operates as a federal state where power is divided between the central government and individual states. However, there are certain unitary features, such as a strong central authority in matters like defense and national security.

(c) Federal State with Federal Features: This is not a term used to describe the Indian political system. India is often termed as a federal state with unitary features.

(d) Federal State: This term generally implies a political entity where power is shared between a central government and regional entities. India is indeed a federal state where states have their own governments and certain powers, alongside a strong central government.