S. 148 : Reassessment-Notice-Recording of reason stating that the assessee failed to file return of income-Contradictory to facts on record-Mechanical sanction-Notice u/s. 143 (2) was issued on same day on which the assessee appeared in response to notice u/s 148-Order was quashed. [S. 143 (2) 143(3), 147, 151]