In the following sentence, four words or phrases have been printed in bold. One bold part in the sentence is incorrectly spelt. Pick up that part and mark its number. If there are no errors in the bold parts, mark (5) i.e. 'All Correct' as the answer.

States have enormous (1) mitigation potential, (2) but the corroboratting pertaining to (3) its effectiveness is still scarce. (4) All Correct (5)