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Question 33: The position of the tiny hyoid bone in our jaws give us fine muscular control over our mouth and tongue, enabling one to make as many as a hundred distinct speech sounds.
The subject of the sentence is 'the position of...', which is singular. So, the verb to match this is 'gives'.
The generic pronoun 'one' cannot be mixed with any other personal pronoun. Option A is incorrect, as it uses both 'our' and 'one' in the same sentence.
The only difference between options C and D is in the use of the plural, 'mouths and tongues' in D. As the sentence uses the plural possessive--'our jaws'--the rest of the sentence has to be in plural to keep the count right.
The question is " Choose the grammatically correct option "
Choice D is the correct answer.
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