"The Congress-DMK alliance is an alliance of corruption while the four-party People's Welfare Front will not be of much help to the people," BJP State Unit President Tamilisai Soundararajan told reporters.
She claimed that no party could form a government in Tamil Nadu without the support of BJP.
The Congress party had entered into an electoral pact with DMK on February 13 to fight the assembly elections.
Later, addressing a session on 'Startup India', organised by various industrial bodies, Tamilisai said, "Under the Narendra Modi government, India has become a powerful country within a span of 18 months, considering the development in almost all sectors.