MCA

The answer is simply 'no'. MCA is a post-graduate course which you can't pursue without an undergraduate degree. So, you need to complete your class 12th and get a Bachelor's degree in hand for that.

You can refer following colleges:
College of Engineering, Guindy
Velammal College of Management and Computer Studies
GKM College of Engineering and Technology
Jaya Engineering College
Jeppiaar Engineering College
Check the below link for more colleges-
https://www.shiksha.com/it-software/colleges/mca-colleges-chennai

MCA has better career options than MBA in IT. It depends on your career goals also. MCA is purely a technical field and MBA is purely management course. Although in MBA IT, you would be given technical knowledge also but it will be theoretical. It's purely based on managing the IT infrastructure and IT management. MCA includes software development and testing, etc. which a pure technical course. Both the fields have equal opportunities but MCA is slightly better.

B.Sc IT would be a more suitable option for you.
Eligibility
Graduation and a bachelors degree obtained through the 10+2+3 system or an equivalent qualification with a minimum aggregate of 50% or equivalent CGPA of any of the Universities incorporated by an act of the central or state legislature in India. A relaxation of 5% aggregate is there for SC/ST candidates.

Hi,
Top US universities such as Harvard, MIT, etc. do accept 3-year Bachelors degree. However, there is no MCA abroad, this is specifically a degree only awarded by Indian universities. You may check for MS Computer Science, Applied Computing, etc.

Hi,
Distance education is still eligible if you apply for private colleges or institutes but full time is required in public colleges.

You can go for Software testing, database Engineer, Web Designer, Technical Support and Network Engineer.

Hi,
The eligibility for a lateral entry to MCA is successfully completion of PGDCA or ADIT course along with BCA from a recognized university or institute. However, every institute has its own eligibility criteria for admission to various programs. So, we would suggest you to directly contact the institute of your choice for admission related queries, as these rules might change time to time.