The Aam Aadmi Party, however, came to Kejriwal's defence, asking whether it was a crime to travel business class, a facility provided by the organisers.

The AAP chief left for a five-day visit to Dubai and New York this afternoon. In Dubai, Kejriwal will receive the award for Asia's most inspiring and young social change maker at the World Brands Summit.He will also address the Abu Dhabi chapter of the Institute of Chartered Accountants of India (ICAI).

Kejriwal will then proceed to New York, where he will deliver a lecture at the prestigious Columbia University and dine with his party supporters.

Kejriwal, a former bureaucrat, is known for his simple lifestyle even when he became the Delhi Chief Minister. He preferred to travel in his Blue Wagon R and opted for a flat as his official accommodation.

Taking a jibe at Kejriwal, Union Minister Rajiv Pratap Rudy said when he met the former chief minister of Delhi at the Republic Day parade, he was surrounded by policemen.

"I had a privilege of taking his photograph and asking MrKejriwal- 'You are a common man and you are surrounded by 60 odd Delhi Police personnel'," Rudy said.

"They do not have any agenda anymore and it is merely a lip service and he stands thoroughly exposed because he does not have anything to speak now. He is a man who prefers to fly business class and that is not very unusual and the people of Delhi must know this," Rudy said.

Congress too mounted attack on Kejriwal, saying his real face has been exposed.

"AAP is completely exposed and the real face of the party has been revealed. AAP does not do what it says and does what it does not say. On one hand they talk about the common man and on the other their chief travels in the business class to collect donation. This clearly shows the intention of the party," Congress spokesperson Shoba Oza said.

After the attack from Congress and BJP, the party rallied behind its leader. "The AAP makes it clear that entire programme details for Kejriwal's five-day trip has already been made public and the ticket for his entire tour has been arranged by his IIT batch mates and organisers.

"The party is surprised at the attempts to rake up an unnecessary issue when all details are in the public domain and all details about the trip have already been provided," AAP said in a statement.

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