New Delhi, April 2: Delhi Chief Minister Arvind Kejriwal has apologized to Fince Minister Arun Jaitley for charges of corruption hurled against him when he headed the Delhi cricket board, making it his fourth sorry in over a fortnight to end litigation against him. Following the apology, tendered in a letter on Sunday but which came into public domain on Monday, Kejriwal and Jaitley moved an application before Delhi High Court seeking withdrawal of the defamation case.