The Delhi High Court will on Wednesday hear an appeal filed by the Central Bureau of Investigation (CBI) in connection with the acquittal of former telecom minister A. Raja and others in the 2G spectrum case. The probe agency on Tuesday filed the appeal in the high court after a special CBI court in a shocking judgment in December last year acquitted all the 19 accused, including A. Raja, in the Rs 30,984 crore scam.