NEW DELHI, March 11 -- The second half of the Budget session of Parliament got off to a torrid start Monday with the Opposition and the government sparring over three contentious subjects-the duplication of EPIC (voter ID) numbers, the New Education Policy (NEP) and the possible delimitation of Lok Sabha constituencies.

Lawmakers walked out, Union education minister Dharmendra Pradhan came under intense attack over his controversial description of DMK MPs (which he withdrew later), and the Lok Sabha was temporarily adjourned even as opposition parties came together to challenge the government on the issues.

Bharatiya Janata Party ( BJP) chief and Union health minister JP Nadda accused the Opposition of trying "defame" the House and sugg...