watch the video to answer the question.

https://youtu.be/EdVqgA-WJ3E

Each of the following are labelled on streams containing species A, B and C. Which of them is/are problematic or not consistent with the convention? n=100molxA=0.2,xB,xCn=100molxA=0.2,xB=0.9,xCn=100molnA=20mol,n_B=50mol,nC nA=20mol,nB=50mol,nC=30mol n=100molwA=0.2,wB,wCm=100gwA=0.2,wB,wCm=100gxA=0.2,xB,xC Each of the following are labelled on streams containing species A, B and C. Which of them is/are problematic or not consistent with the convention? n=100molxA=0.2,xB,xCn=100molxA=0.2,xB=0.9,xCn=100molnA=20mol,n_B=50mol,nC nA=20mol,nB=50mol,nC=30mol n=100molwA=0.2,wB,wCm=100gwA=0.2,wB,wCm=100gxA=0.2,xB,xC