Hello Swapnil,

Since you have passed MSc in physics, you are eligible to answer GATE 2021. Even the students who are in 1st year or 2nd year of their MSc course are eligible to answer this exam. There is no age limit to answer this exam. So, even if you have qualified in MSc course in the year 2017, you are still eligible to appear for GATE 2021 according to the revised guidelines.

For more information, you can read the following article: https://engineering.careers360.com/articles/gate-eligibility-criteria

Good luck and stay safe!