First CAD system called AutoCAD for the PCs was announced in the year 1982. Can you tell who announced it?

Answer: Option C

It was in 1982 when a group of programmers, led by John Walker, developed the first version of AutoCAD, the software that Michael Riddle, another member of that team, had created before.
AutoCAD is a commercial computer-aided design (CAD) and drafting software application. Developed and marketed by Autodesk Inc., AutoCAD was first released in December 1982 as a desktop app running on microcomputers with internal graphics controllers.