In which case the Supreme Court of India held that the voters have a right to know the antecedents of contesting candidates?

In Union of India vs. Association for Democratic Reforms (2002), the Supreme Court held that voters have a fundamental right to know the antecedents (background, criminal record, assets, etc.) of contesting candidates under Article 19(1)(a) (right to information) which is essential for free and fair elections. The ruling established that disclosure of candidate information is crucial for informed voting. Option C correctly identifies this case (with a minor typo 'Retirm' instead of 'Reforms').