S. 148A: Reassessment-Conducting inquiry, providing opportunity before issue of notice-Unexplained investments-Writ against issue of notice under section 148 was dismissed-Assessee filed SLP against order of High Court-Assessee sought permission to withdraw SLP with liberty to file review before High Court-SLP filed against order was to be dismissed as withdrawn with liberty to file review before High Court.[S. 131(IA), 148A(b), 148A(d), Art. 136]