He pointed out that the Trinamool Congress chief has already spoken Prime Minister Manmohan Singh seeking replacement of Trivedi by union minister Mukul Roy.
"The Prime Minister has agreed to in principle to effect the replacement at an appropriate moment. He is supposed to implement it," Bandyopadhay said.
He said in a coalition government the partner decided who would be its minister.
"In a coalition government, a party decides who would be its minister. The question of an individual does not arise."