hi,

see  data science considered as interdisciplinary stream and students from any of the department may apply for data science. however data science course is based on computer programming, mathematics and statistics concept. so if you have decided that you wants to make career in data science domain only, then it would be best to study for gate exam from computer science stream. students are eligible to apply for gate exam paper  irrespective  of their graduate degree course.

some of the best institute which offer m.tech in data science is as follows:

BITS PILANI

IIT HYDERABAD

IIT GUWAHATI

XAVIOUR UNIVERSITY

HOPE IT WOULD HELP.