Hi Vihan,
As per the qualifying criteria for KCET,you should have succesfully passed the qualifying exam i.e 10+2.Further is reuires you to have mathematics as a subject and you shoul have to pass it.
As you have not cleared it,I am afraid you will be eligible for KCET.For reference,I am putting you the link describing the details of KCET:
https://engineering.careers360.com/articles/kcet-eligibility-criteria
Hope it helps.
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