S. 148A : Reassessment-Conducting inquiry, providing opportunity before issue of notice-Unexplained investments-Notice issued on the issue of unexplained investment-Order passed on other issues without issuing an opportunity to explain-Assessing Officer was directed to pass order afresh after giving an opportunity of personal hearing to assessee-Matter remanded.[S.69, 148A(b), 148A(d), Art. 226]