Choose the most suitable option to replace the highlighted part of the sentence: The country has at least twenty colleges of whom only six are officially recognized.
Of which only six are officially recognized
The highlighted clause qualifies the noun "colleges", so both the relative pronoun and the verb inside the clause must agree with that antecedent.
Colleges are things, not people, and English uses "of which" to refer back to non-human antecedents, keeping "of whom" for persons; this at once rules out the original "of whom".
The subject of the relative clause is "six", which is plural in number, so it needs the plural verb "are" rather than the singular "has".
The recognising is something done to the colleges by an authority, so the passive construction "are officially recognized" is the appropriate form here.
Putting the correct pronoun and the correct plural verb together gives "Of which only six are officially recognized", which is option D.
Options A and B both keep the wrong pronoun "of whom", which cannot refer to colleges; and option C uses the singular "has", which fails to agree with the plural subject "six".
Since only option D fixes both the pronoun and the number agreement, it alone is grammatically sound.
Hence the most suitable replacement is Of which only six are officially recognized.
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We met at the restaurant at a long time.
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He is married with a woman who works in the Navy.
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She put on all his paintings in the attic.
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The ban was imposed by the commercial taxes department on Friday after protests by a certain community, which has threat to burn cinema halls screening the controversial movie.
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The village is further in the valley, nestled among the hills.
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She remained calm by the procedure.
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The plane flew on the city, offering a great view.
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The company has done away for unnecessary paperwork by going completely digital.
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Your brother is after the age where he needs a babysitter.
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The manager was asked to write a report in a quick, detailed and in a thorough manner.
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Gayatri informed one of the directors that she has sent the material for printing.
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The man spent a lot because he had so large amount of money.