Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select ‘No substitution required’.
A team of biologists `ul"have been discovered"` four new species of horned frogs in the North Eastern region of India.

Options

A. No substitution required
B. has been discovered
C. has been discovering
D. has discovered

Answer

D

Explanation

A Team of biologists refers to a singular group. So, it will be considered as a single entity(subject) and which will take .has. as a singular helping verb. Also the question is given in passive form. It should be in active form .