Open elective(nptel)

I did one vit open elective course ,without knowing about nptel earlier and got a B grade😭😭 ,I am from cse specialization and allowed to take 9 credits open elective only , so should I take nptel this sem ? if I take will its grade matter ?as I heard there are 6 credit mandatory course for specialization so even if I take nptel , my vit open elective course(B grade) will be counted and not nptel 😞,what should I do ???