S. 148A: Reassessment-Conducting inquiry, providing opportunity before issue of notice–Natural justice-Assessee not responding to two show-cause notices despite grant of time requested Refusal to grant further time-No violation of principles of natural justice-Alternative remedy-writ petition dismissed. [S. 144B, 147, 148, 148A(b), 148A(d), 246A, Art. 226]