Under which Article of the Indian Constitution, it is the duty of the Union Government to protect States against external aggression and internal disturbance?

Which of the following is correct for the Hindu Succession Amendment Bill 2004 which the Parliaments has passed in 2005?

Total number of seats in Lok Sabha

The number of Schedule in Indian Constitution

Which of the following is not correct for Money Bill?

The words ‘Socialist’, ‘Secular’, and ‘Integrity’ were added in the Constitution by: