Select the most appropriate option to fill in blank 1.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. propounded.
The passage is in the past tense ('Centuries ago'), so we need the past form of the verb.
Propounded means put forward or suggested an idea or theory for consideration, which fits perfectly here because Aryabhata suggested the concept of zero long ago.
Why not the others?
has propounded – Present perfect tense, which is used for actions with a link to the present. The event happened centuries ago, so this is incorrect.
propound – Present tense; doesn't match the past time marker “centuries ago.”
propounds – Simple present; also incorrect for the same reason.