Some answers, many questions still

When did Patel really resign? When did Das get the mandate to take over as RBI governor?

Did Urjit Patel resign as Reserve Bank governor for personal reasons as he stated in his parting letter? Did Patel meet Prime Minister Narendra Modi in the midst of a stormy relationship between the government and the RBI sometime in November? Did he offer to resign during that meeting with the PM but was persuaded to keep things on hold? Did Patel keep the PM informed that he was going to step down as governor once the state elections were over or was it a sudden resignation? If it was a sudden resignation, what was the latest trigger? When did the