Hello

since you haven't mentioned the exam I'm going to presume its JEE mains.

congratulations for your results. Yes you can certainly retake the exam if you are willing to. To be able to better your scores you will have to work harder and put in more efforts.

In case you want to find out your college chances you can use the link which i will leave below. using that link you will be able to predict your chances.

Https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope my answer was helpful to you.

all the best to you.