Correct option is C
The correct answer is option (c).
Explanation:
- The structure solution to is correct because the standard collocation is “a solution to a problem.”
- The verb dispose is used with the preposition of. Hence, the correct phrase is disposing of, not disposing alone.
- Option (c) correctly forms the expression: solution to disposing of otherwise persistent waste materials, meaning waste that would otherwise remain persistent/difficult to manage.
Correct sentence (with replacement):
Incineration has been used for decades as the magic-bullet solution to disposing of otherwise persistent waste materials.
Why other options are incorrect:
- (a) No correction required is wrong because disposing requires of after it.
- (b) Uses solution of, which is not the correct collocation here; also breaks the required prepositional structure.
- (d) disposing off is incorrect; off is not used with dispose in this meaning.
Grammatical rule (English):
Dispose of + noun; and “solution to” is the correct prepositional pattern.
व्याकरण नियम (Hindi):
Dispose के साथ of का प्रयोग होता है (dispose of). “Solution” के साथ सामान्यतः to आता है (solution to).
So the correct answer is (c)
English
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