greetings,

It all depends on the type of exams you are aiming for.

If you have dropped out in your under graduation and are below 21 years of age then you can definitely appear for most competitive exams in India. You may have to submit a gap certificate at the time of admission though.

If you are past the age of 21 then the options start getting limited. You can appear for CLAT which has no age limit or for some arts and Humanities courses at colleges like AMU, BHU, etc. that have max age limit for under graduation somewhere around 24 years old for general category.  You can also pursue BCA, BBA, etc.

Please do comment and mention your follow up doubts as you have not provided much information to answer extensively.

Good day!