Four days after accepting Madhya Pradesh Chief Minister Kamal Nath's challenge to contest from the "toughest" seat in the Lok Sabha elections, veteran Congress leader Digvijaya Singh has been declared a candidate from the Bhopal seat. "He said you decide where should I contest from, so I decided. I said contest from Bhopal," news agency ANI quoted Kamal Nath as saying after the announcement of Mr Singh's candidature from Bhopal.