Hi Prashant!
As you are saying that you completed your 12th after four years of completion of 10th class. So, you have gap of 2 years in your studies. Most of the companies do not allow gap year candidates to sit for interview where as some companies allow candidates having maximum 2 years gap for placements.

So, chances are that you won't be able to sit for the companies which do not open their interviews for candidates having any gap.

Also, the gap considering companies might ask you about gap you took during the interview and prepare for this question well.

Hope I answered your query, thankyou!