Which of the options given below may suitably replace the phrase printed in bold to make it grammatically correct? If the sentence requires no correction, mark (d) as the answer.
When ice and water existed together on the same volume, the temperature remains constant.
A
exist together in
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B
will exist together on
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C
had existed together in
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D
No correction required
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Solution
The correct option is B exist together in Option A is the correct answer because according to the statement about ice abswater, such a fact is stated in the present tense in general, hence it is correct to say that when they ‘exist together in’ the same volume, as the substances can occur “in” a particular state of matter, and not “on”.
Option B is incorrect because the statement is meant to be in the present, while the option is in the future tense.
Option C Ian incorrect because it is past tense while statement is a fact and so should be in present.