There is no official information regarding the average packages offered in bit mesra for any branch but yes the number of student placed in 2021 from chemical plastic and polymer were 28% and in production the stat is about 44% if you are not inclined towards any particular subject then my recommendation would be to go with production and industrial engineering as it is very much similar to mechanical engineering and in future demands of such engineers is going to increase where as chemical engineering in india does not have many opportunities but yes production will be a good decision so choose wisely