23 July 2013
Its not possible to pursue 2 professional courses simultaneously because of training requirements.ICAI (CA institute ) has become even stricter these days for 2 courses.So reconsider a choice between CA and CWA. There is as such no restriction on leaving any course once you start it
04 January 2014
Yes you can cwa in this case.Make sure you submit a proof of leaving b.com to ICAI at the time of seeking permission from ICAI for ICWA.