Kolkata, Apr 29: The Bharatiya Janata Party''s (BJP) prime ministerial candidate, L K Advani, on Wednesday laid the onus on Trinamool Congress chief Mamata Banerjee to choose between the United Progressive Alliance (UPA) and the National Democratic Alliance (NDA).

Talking to reporters at the airport after arriving in the city to campaign for the elections, Advani said, "Mamata has to decide whether she wants to join the NDA or stay with the Congress."

Advani clarified that the decision to leave the NDA and join hands with the Congress was solely taken by Banerjee.

"It was she who decided to leave the NDA and have a tie-up with the Congress for the Lok Sabha polls in West Bengal," he said

Terming the UPA as "opportunist", Advani critisised it for having no "pre-poll manifesto or common ideology".

"The only aim of the parties to come together was the fear of BJP and to keep it out of power," he said. (ANI)