Question

In the following question, a sentence is given with a phrase highlighted in bold. Select the option given below that can replace the phrase in bold to make the sentence grammatically and contextually correct and mark that as your answer. If the sentence is correct as it is, mark 'no improvement required', as the answer One of the main motive for betterment was to increase the contact ratio of the gear pair.

Q: Answer-In the following question, a sentence is given with a phrase highlighted in bold. Select the option...

a According to the rule, one of the is followed by a plural noun and a singular form of a verb, so the use of options b and d is incorrect. Option c does not give a meaningful sentence moreover, the use of were is incorrect. So, option a is contextually and grammatically correct as it discusses the concern related to the contact ratio of the gear pair i.e., to work on optimisation. Hence, option a is correct.