New chemicals are not always tested to determine if ______will cause cancer of genetic mutations.

A it

B he

C she

D they

Solution

Correct Answer: Option D

-sub যেহেতু plural সুতরাং sub-কে follow করে যে pronoun আসবে তা হবে plural।
-তাই new chemicals- এর pronoun হিসেবে they ব্যবহৃত হবে।

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