Which among the following major industrial region is not classified by Jharkhand Government?

The correct answer is D. JIADA.

AIADA stands for Adityapur Industrial Area Development Authority. It is a government body responsible for the development and management of the Adityapur Industrial Area in Jharkhand.

BIADA stands for Bokaro Industrial Area Development Authority. It is a government body responsible for the development and management of

the Bokaro Industrial Area in Jharkhand.

RIADA stands for Ranchi Industrial Area Development Authority. It is a government body responsible for the development and management of the Ranchi Industrial Area in Jharkhand.

JIADA is not a major industrial region classified by the Jharkhand Government.