Short answer: Use NCERT for domain subjects, a practice source for the general test and daily language reading.
Domain subjects
Class 12 NCERT is the base for most domain subjects. Check the syllabus for your chosen subjects.
General test
Practise reasoning and general knowledge from a single practice source.
Language
Read daily and practise comprehension.
Frequently asked questions
Is NCERT enough for CUET?
It is the base for most domain subjects; add practice questions.
Where can I find CUET books?
Browse second hand and new CUET books on Bookaao.