S. 250 : Appeal-Commissioner (Appeals)-Procedure-There is no provision for rejecting an appeal for non-appearance of appellant-Irrespective of question whether appellant had appeared or not, appellate authority had to take decision by strictly following mandate contemplated under section 250(6) which could only be a decision answering points raised in appeal-CIT(A) was directed to decide the appeal within three months from the date of receipt of the order. [S. 10(10C), 89(1),250(6), Art. 226]