dear isha gupta,

the mbbs course usually commences in mid july or first week of august though it variates for each state, depending upon their respective counseling process. i hope this solves your query, for any doubt regarding the same, you can drop it in the comment section given below.

Hello dear,
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It is same for every College to start MBBS classes after 3rd counseling...
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And you haven't mentioned state or college you have joined or willing to join for providing you details
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3rd counseling dates are starting from 25th of july and ends on 27th of july, document verification is on 6th August ..
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So according to this information college will Start its syllabus within 15 to 25 days immediately after completing 3rd counseling for sure..
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If u have a seat from particular college, you can visit college official website for its information and mostly co-student,worker or present working faculty can Only answer exact date.
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Hope i cleared your question to some extent.Thank you