Detailed explanation and options for the selected question.
A person must be at least 25 years old to contest elections for the Lok Sabha, as per Article 84 of the Indian Constitution. Option "30" is incorrect as the minimum age requirement is 25, not 30. Option "35" is the minimum age for the President of India, not the Lok Sabha. Option "40" is too high for the Lok Sabha, which requires only 25 years.