Direction: In the given question, four words are printed in bold and are numbered. Of these, the positions of two of these words may be incorrect and need to be exchanged to make the sentence correct. Find the two words that need to be exchanged. In case the given sentence is correct, your answer is e, i.e., 'No correction required'. The conference (

• A was attended by groundbreaking (
• B scientists and experts from around (
• C the world, who shared their prominent (
• D research findings.