The Congress apologised on Sunday after an advertisement on its 85th plenary session, which did not feature India's first education minister and freedom fighter Maulana Abul Kalam Azad, triggered a controversy and the party received flak from several quarters. The party said it was "an inexcusable slip-up", for which responsibility was being fixed and action would be taken. The full-page advertisement, published in dailies on the third day of the plenary session on Saturday, featured Congress leaders of the past -- Mahatma Gandhi, Jawaharlal Nehru, Sardar Vallabhbhai Patel, B R Ambedkar, Subhas Chandra Bose, Lal Bahadur Shastri, Indira Gandhi, Rajiv Gandhi, P V Narasimha Rao and Sarojini Naidu. Sharing the advertisement on Twitter, Congress MP Manish Tewari said, "The @INCIndia has a pantheon of Muslim leaders who struggled against fissiparous tendencies especially within their community that led to creation of Pakistan & dedicated themselves to inclusive idea...