Which of the pair of words/ phrases, (1), (2), (3), and (4) given below should replace the words/ phrases given in bold in the following sentences, to make it grammatically meaningful and correct. If the sentence is correct as it is and no correction is required then mark option (5) as the answer.
They are highly efficient and especially adroit at cutting out excessive steps and cumbersome procedures.
1
abstain in, cushioning
2
abashed in, determined
3
bemoan at, dejected
4
omnipotent, intransigent
5
No correction required