Dr Kumar of Maulana Azad Medical College told the court about the syllabus of Bachelor of Dental Surgery (BDS) course.
The CBI today produced him as a witness.
CBI special judge S Lal fixed February 4 as the next date of hearing in the case.
Teenager Aarushi and domestic help Hemraj were murdered in 2008 and her parents, dentists Rajesh and Nupur Talwar, are being tried for the killings.
