In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

Students put their heart and soul into studies while (1)________ for examinations. They prepare the syllabus by giving many revisions, making important points on flash cards, preparing notes throughout the year. They read reference books in order to score good marks in the examination. This is the demanding (2)________ of all the students who are appearing in the examinations. But, most students feel tensed on the day before an examination. Everyone is in a state of (3)________ as to what questions would be asked in the paper and whether they could write their answers properly to get good marks. Such overthinking is the cause of (4)________ which definitely affects their performance. They should revise the subject regularly and should not keep their doubts pending. This will not create a (5)________ of backlog and they will get sufficient time to resolve their problem.