Indian Agricultural Research Institute

There are students who have ABC group I. e. Agriculture, Biology &Chemistry in their 10+2 and appear in ICAR exam with the same group.

Hi Ritika,
Of course you can get a job. No problem. ICAR does not affiliates Universities it just ranks agri universities as per their criteria (which is ofcourse a drawback of ICAR). So any UGC affiliated university can start B.Sc. (http://B.Sc) agri programmes without asking ICAR. But ICAR accredited universities are always better for agriculture

You have not written about the major subject groups like Agriculture, Horticulture, etc. for which PG entrance syllabus is required. However, please use this link for downloading the syllabus for desired subject group. https://www.icar.org.in/content/syllabus-aieea-ug-aieea-pg-and-aice-jrfsrfpgs-2019.