Which of the phrases given in the options should replace the word/phrase that is underlined in the sentence to make it grammatically correct? if the sentence is correct as it is given and no correction is required, select 'No correction required' as the answer.
It was a fairly difficultly task for him to comprehend the entire lecture in one sitting, but he achieved it.
1
a rather difficult task
2
fairly a difficult task
3
rather a difficult task
4
a difficultly yet fair task
5
No correction required