Directions: In each of the questions below, five sentences are given that may or may not contain an error. Choose the one that is grammatically or contextually incorrect and meaningless. If all the sentences are correct, mark 'All are correct as your answer'.
1
The experiment yielded unexpected results, which were analyzed further.
2
John and Sarah is going to the concert together.
3
The shop offers a variety of organic products.
4
She always finishes her work before the deadline.
5
All are correct.