Multiple choice

For centuries, the confusion as to if plants employed self-pollination or cross-pollination confounded the budding science of botany; however, recent research suggest that pollen is transferred by both self pollination and by cross pollination.

  1. the confusion as to if plants employed self-pollination or cross-pollination confounded the budding science of botany; however, recent research suggest that pollen is transferred by both

  2. the confusion as to whether plants employed self-pollination or cross-pollination confounded budding botanists; however, recent research suggest that pollen is transferred by both

  3. the confusion as to whether plants employed self-pollination or cross-pollination confounded budding botanists; however, recent research suggests that pollen is transferred both by

  4. the confusion if plants employed self-pollination or cross-pollination confounded budding botanists; however, recent research is suggesting that pollen is transferred both by

  5. the confusion as to whether plants employed self-pollination or cross-pollination confounded the budding science of botany, however, recent research suggests that pollen is transferred both by
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C Correct answer
Explanation

Correct. The option removes the errors of unidiomatic use by replacing 'as to if' with 'as to whether'. Also, the option substitutes 'budding science of botany' with 'budding botanists'. Also, the option removes the subject-verb error by giving singular verb, 'suggests' for research - a singular subject.

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