CIT couldn’t revise block assessment without any material showing that deduction was wrongly allowed

IT : Where there was nothing on record to suggest that any material was unearthed during search or during proceedings initiated under section 153A showing that certain relief in form of deduction was wrongly allowed to assessee, Commissioner could not invoke jurisdiction under section 263 on ground that assessment order passed under section 153A, read with section 143(3) was erroneous or prejudicial to interest of revenue