Correct option is A
The correct option to fill in the blank is (a)
finest.
Explanation: The superlative form
“finest” is the most appropriate here because it implies the best possible quality tailored for individual needs. (सबसे अच्छा / उत्कृष्ट)
Example: These are the finest quality lenses available in the market.
Explain why other options are incorrect:
·
(b) Fine: Refers to good quality but not in a comparative/superlative sense. (अच्छा)
·
(c) Finer: Comparative form, used when comparing two items only. (बेहतर)
·
(d) More finely: An adverb, doesn't fit the grammatical structure of the noun phrase. (अधिक बारीकी से)