<p>would it be huge mistake if i put my mark as B, but i actually got an A????????????</p>
<p>I would be more concerned if it was the other way around. It shouldn’t be a big deal to send an explanation explaining the correction.</p>
<p>Since apps were due Nov 30, I assume you are talking about something that has already occurred. That you put a B rather than A will not be considered a wrong that affects admission except, of course, they will be acting under the assumption that it is in fact a B when determining admission. The only way you can now correct that error is to notify, in writing, each UC to which you applied and inform them of the correction.</p>