He, however, returned in less than 10 minutes to witness the historic launch of the Goods and Services Tax (GST).
Samajwadi Party, which broke ranks with opposition Congress, RJD, Left and TMC to attend the one hour event, got front row seat for its leaders.
Ramgopal Yadav, who is the cousin of SP supremo Mulayam Singh Yadav, was seated on the front row with an AIADMK leader and midway through the event fell unwell and was escorted out by Minister for Skill Development Rajiv Pratap Rudy.
After the ceremony got over, some participants went up to Yadav to enquire about his health.
Former Prime Minister H D Deve Gowda, who was a special invitee and seated on the specially erected dais with Modi and Mukherjee, walked up to Yadav and hugged him after the launch event concluded.
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