In which body was the Constitution of India deliberated upon?

The correct option is Constituent Assembly.

Explanation:
The Constitution of India was drafted, discussed, and deliberated upon by a specially elected body of representatives known as the Constituent Assembly.
This assembly was first set up in 1946 under the Cabinet Mission Plan before India gained independence. The members of the Constituent Assembly represented different regions, communities, and political groups of India. They spent nearly three years (specifically, 2 years, 11 months, and 18 days) debating, drafting, and refining every clause of the Constitution to ensure it reflected the diverse needs and democratic aspirations of the newly independent nation.

Here is why the other options are incorrect:
1. Parliament of India: The Parliament of India came into existence only after the Constitution was adopted and the first general elections were held (1951-1952). The Parliament is a creation of the Constitution itself, so it could not have deliberated upon its creation.
2. Through Newspaper coverage: While newspapers reported on the proceedings and public opinions were shared, newspapers were not a formal decision-making body that deliberated upon or drafted the constitution.
3. Princely States: Although representatives from the Princely States joined the Constituent Assembly, the Princely States as independent political entities did not collectively deliberate upon or draft the Constitution of India.