The reason for the Constitution of India to be republican is that it:

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Correct option is A

The correct answer is (A) provides for an elected Parliament.

Explanation:
The Constitution of India is republican because it provides for an elected Parliament, ensuring that the head of state is elected, not hereditary.

Incorrect Options Explanations:

• provides for adult franchise: It ensures voting rights for all adults but does not define republicanism.
• contains a bill of rights: Fundamental Rights are present but do not define republicanism.
• has no hereditary elements: While there are no hereditary elements, the key feature is the election of Parliament.

Information Booster:

• Elected Parliament: Ensures the head of state is elected.
• President of India: The President is elected, confirming India's republican structure.

Key Points:

• Elected government: The Constitution provides for an elected Parliament and head of state.
• Longest Constitution: The Indian Constitution is the longest written national constitution.
• Sources: Inspired by the Government of India Act 1935, British Constitution, and American Constitution.
• Preamble: Defines India as sovereign, socialist, secular, and democratic.