For election to the Lok Sabha, a nomination paper can be filed by

Option (c) is correct because, under the Representation of the People Act, 1951, a candidate for the Lok Sabha must be a citizen of India and a registered elector in any parliamentary constituency. Option (d) is the most tempting wrong choice, but it is incorrect because citizenship alone is insufficient; the individual must also be enrolled in an electoral roll and meet the minimum age requirement of 25 years. The core concept being tested is the statutory and constitutional qualifications required to contest elections to the Parliament of India.