Hello Aspirant,

National Talent Search Examination is a national level scholarship initiative conducted by the NCERT authorities. There are two exams under that , one is SAT which is the scholastic aptitude test,consisting mainly of maths ,science and social science .The other one is MAT which is the mental ability test.  The official answer keys for this exam has been released by some state authorities. You may check with their official website or visit the below link where you may download the answer key directly .

https://school.careers360.com/download/sample-papers/ntse-karnataka-matsat-question-paper-answer-key-2019-20

All the best