IANS/Kolkata/New DelhiIn a hardening of stands, the Trinamul Congress yesterday asked its nominee and Railway Minister Dinesh Trivedi to resign, but he sought written instructions from party chief Mamata Banerjee.Banerjee put the ball in the central government’s court on the issue of replacing Trivedi with another party leader Mukul Roy and said she had already conveyed whatever was needed. “Now the (United Progressive Alliance) government has to decide.”“We have renominated Mukul Roy as our Rajya Sabha candidate. He is our general secretary and future railway minister,” the West Bengal chief minister said.Trinamul Congress parliamentary party chief whip Kalyan Banerjee phoned Trivedi, who has fallen out with the party leadership after raising passenger fares in the railway budget, and asked him to make an honourable exit before he was dismissed.“Don’t ask me anything. Talk to Kalyan (Banerjee). He is the chief whip of the parliamentary party,” Banerjee told reporters.Trivedi confirmed receiving a call from the chief whip.“Kalyan Banerjee had called me in the morning. But earlier Sudip Bandopadhyay (Trinamul parliamentary party leader) said in the Lok Sabha that ‘we have not told him (Trivedi) to resign’. And the prime minister (Manmohan Singh) has also not told me to resign,” he said.“On the floor of parliament it is being said no resignation has been demanded. And after that now I am being asked over phone to quit. So I should know the truth,” Trivedi told reporters in New Delhi.Earlier, Trivedi said he was ready to resign provided his party conveyed it to him properly.“I will abide by the party’s decision. If I wanted to stay in my chair, I could have. I don’t want to be humiliated like this. I have done my bit. Let them convey it to me properly. I will resign in a day or two,” Trivedi told CNN-IBN news channel.Kalyan Banerjee said he had called Trivedi as a colleague. “As chief whip I told him when the party does not want you to continue as minister, why are you not gracefully coming out? He said unless the party chairperson gives him in writing he won’t.”“I told him when you became a union minister, our chairperson did not give you anything in writing. Our leader has already sent a communication seeking his replacement. He will be dismissed. For him, it would have been better to give his resignation than get sacked,” Kalyan Banerjee said.“Whatever is to happen will happen. If he wants so, then let him come out with the stigma of dismissal,” he said angrily.Asked whether the party would give him a written communication on its stand, Kalyan Banerjee said: “First let him hand over to us anything that he has in writing from Mamata Banerjee that prompted him to take oath as a minister.”“It was only a party decision that he should become minister. Similarly the party has been clear in its stand that he should quit,” he said.Trivedi’s maiden rail budget on Wednesday proposed an all-round fare hike after 10 years.Angry with the decision, his party chief urged Prime Minister Manmohan Singh on Wednesday night to replace Trivedi with Mukul Roy.Communist Party of India (Marxist) leader Sitaram Yechury described the impasse as an unprecedented mess in the history of parliamentary democracy.He said the prime minister must resolve the issue.“We have never heard or seen anything like this in the past. So, it’s up to them to decide how they want to handle it, it’s up to the concerned party and the leader of this in coalition, the Congress, and the prime minister. They have to take a call and decide how to resolve this issue,” said Yechury. “But the fact remains that the railway budget has been presented to parliament. It is now the property of the parliament, nothing can be done to the railway budget except by parliament. So, that is something which is invariable in parliamentary democracy and the rules by which it functions,” he added.