Bihar Deputy Chief Minister Tejashwi Yadav on Tuesday appeared before the Enforcement Directorate (ED) here for questioning in a money laundering case linked to the railways land-for-jobs 'scam' case. The 33-year-old Yadav, the son of RJD chief and former Bihar chief minister Lalu Prasad, reached the federal agency's office in central Delhi in a carcade. He was questioned by the CBI in this case last month.