Hi Vivek,
The Metallurgy department in IIT Patna is quite a new branch. Moreover it is difficult to judge the placement scenario for so new a branch based on past details. Perhaps at the same rank, you might be making into Metallurgical Engineering at IIT BBSR, or Mining Machinery or Environmental at IIT ISM Dhanbad or Ceramic Engineering at IIT BHU. These have better placement prospects, you can try for these.
In case, you're not making any, you might consider IIT Patna for Metallurgy.
Hope this helps.
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