How is the placement of ceramic engineering in iit bhu and biotechnology in iit roorkee?Should i go for any one of them or should i go for BArch in iit roorkee? Which is better?plz tell the details of average package for these branches and the companies they are placed in.

Ceramics BHU  is better option unless you have specific interest in Bio or Architecture. Hardly anyone works in ceramics abd students end up getting placed in software or consulting comanies. Biotech is bit better option than Archi unless you like Archi. Purely from placement perspective.