Explanation

A is correct because the Bharatiya Janata Party (BJP) has been in power at the central level of government. B is incorrect because the Indian National Congress (INC) is currently not the ruling party at the center. C is incorrect because the Aam Aadmi Party (AAP) rules only in specific state governments, not nationally. D is incorrect because the Telugu Desam Party (TDP) rules only in certain states and is not the current national ruling party.