Select the most appropriate option to fill in the blank.
He indeed is intelligent who _________ this and succeeds in making all work truly great.

Correct option is C

The correct option to fill in the blank is (c) notices.
Explanation:
The sentence is in the present tense and the clause “He indeed is intelligent who _______ this…” requires a present simple verb to maintain subject-verb agreement.
“Who notices this…” correctly completes the clause referring to a person who is intelligent.
Example: He is the one who notices even the smallest details.
Explain why other options are incorrect:
· Was noticed – past passive form, does not fit here.
· Noticed – past tense, but the sentence requires present tense.
· Noticing – present participle, grammatically incorrect here.
Grammatical rule used:
Relative clauses referring to a general truth or habit in the present take the simple present tense verb.