Here are some suggestions on these two options-
Biotech is a good branch with increasing scope. The Biotech Department of NIT Allahabad offers good facilities to its students. The college also organizes an annual Biotech fest by the name of “Biosangam”.
IT is a very safe option these days. It offers good career opportunities. To do well in this field, one has to stay updated on tech developments and work on one’s coding skills. This field requires self-training the most. I am not aware of the IT department at IIEST Shibpur. IT students at IIEST would know the best about the placement prospects.
Both these options are good. The choice depends on one’s interest area.