CBSE

Students who wish to pursue medicine from the United Kingdom must be at least 18 years of age at the time of application of admission. Applicants must have secured a minimum of 80 in their 10 12 grade. This percentage is to be achieved in Chemistry and Biology compulsorily
To pursue MBBS in the UK after 12th, you need to essentially have NEET scores, at least 50 in NEET or good scores in UKCAT, BMAT GAMSAT, etc. MBBS is referred to as MB ChB/MB BCh in the UK as the short form of Bachelor of Medicine and Bachelor of Surgery. MBBS requirements for UK Eligibility Criteria
You must have qualified National Eligibility cum Entrance Test NEET or UK CAT University Clinical Aptitude Test BMAT BioMedical Admissions Test GAMSAT Graduate Australian Medical School Admissions Test.

Vellore Institute of Technology (VIT) is a highly reputed university that offers admission to its undergraduate programs based on the performance of students in the VITEEE (VIT Engineering Entrance Examination) or on the basis of their marks in 10+2 or equivalent exams. For admission to the BCA programme at VIT, you will have to apply through the VIT admission portal and provide your 10+2 marks. The cut-off for the BCA programme at VIT varies each year, depending on factors such as the number of applicants, the number of seats available, and the difficulty level of the exam. Based on your marks of 89.2 percent in CBSE class 12, you have a fair chance of securing admission to the BCA programme at VIT. However, the final admission decision will depend on several other factors such as the number of applicants, the cut-off marks for the year, and your performance in the admission process. Therefore, I suggest you apply to VIT and also explore other options simultaneously. Keep a track of the admission notification and cut-off marks for the BCA programme at VIT on their official website, and prepare accordingly for the admission process.