Explanation:

- Each house of the Parliament should meet frequently to discuss and legislate effectively.

- The maximum gap allowed between two sessions of either House is to ensure regular oversight and continuous governance.

- The Constitution of India mandates this interval to be no more than six months.

- Meeting at least twice a year ensures that parliament reconvenes to update and address new and ongoing issues.

- Option 1: Three months - Too frequent as per Constitutional requirement.

- Option 2: Four months - Also more frequent than required.

- Option 3: Five months - Not the maximum permissible gap.

- Option 4: Six months - This is indeed the correct maximum interval.

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