Question

In which phrase does “some” refer to a singular noun?

Answer 1

B some of the police force 
police force is singular

Answer 2

Answer : B. some of the police force
Among the choices above, it is the phrase in letter b wherein the pronoun "some" refers to a single noun which is " the police force". As you can see, the police force refers to a group of policemen making it a collective noun taking the singular form of the verb. The other objects of the pronoun "some" in the other options are all in plural form such as economy cars, native people, and the 6y foods.