Well, Aman very pertinent question indeed. If the entertainment of clients in hotels is for business purpose deduction will be available.
Incentive paid to article assistant for clearing exam at first attempt may not be looked in favour of the assessee and get disallowed as it is optional.
as the question regarding payment to article in passing first attempt is allowed.....the same question is asked by icai in ipcc exam...the attempt is not accuratley remembered by me but i m sure it will be allowed.........