The ban was issued by the Supreme Court following hearings of a petition filed a few years ago.
National Science Day is celebrated every year on 28th February.
CBSE wants to test the open-book exam format.
Farmers had also protested against the government a few years ago.
The SC’s verdict came after many petitions regarding electoral bonds were filed with the court.
CUET UG is an important exam for college admissions in India.