Hello,
The eligibility criteria to be eligible to appear for GAT-B for admission to M.Sc you must have passed Bachelor's degree in 10+2+3 pattern in the respective field with at least 55% aggregate marks from a recognized university. Considering the eligibility criteria you are not eligible to get admission in M.Sc though GAT-B as B.Tech is 4 year course. But you are eligible to get admission in M.Tech through GAT-B. The eligibility criteria is that a candidate must have passed B.E/B.Tech in the relevant field with minimum percentage of marks specified by the participating institute from a recognized board.
To check the eligibility criteria and other details click on the link below
https://university.careers360.com/exams/gat-b#:~:text=GAT%2DB%20Eligibility%20Criteria%202021%20%2D%20M.VSc%20Animal%20Biotechnology&text=%26%20A.H.%20degree%20or%20a%20equivalent,marks%20in%20the%20traditional%20system.
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