defence exam Agniveer Army Clerk/Store Keeper 2025 Mock Test Series English Grammar Phrase Replacement
Directions: Select the most appropriate option to improve the underlined segment in the given sentence. If there is no need to improve it, select ‘No improvement’.
Phenomena such as sunspots have puzzled scientists for centuries.
1
has puzzled scientists for centuries
2
have puzzled scientists since centuries
3
has puzzled scientists since centuries
4
No improvement