Final answer:
The use of 'none' as a singular indefinite pronoun is correct in Option B: 'None of the cake was left after the party.' This is because 'cake' is a singular noun, which makes 'none' singular, and the verb 'was' is appropriately singular to match.
Step-by-step explanation:
When discussing indefinite pronouns such as 'none', it is important to consider the noun to which 'none' refers. If 'none' refers to a singular noun, it takes a singular verb. If it refers to a plural noun, it takes a plural verb. Understanding how to use singular and plural indefinite pronouns in context helps maintain correct subject-verb agreement.
For a sentence with a singular indefinite pronoun using 'none', one must look for a sentence where 'none' refers to a singular noun.
In the provided options, Option B, 'None of the cake was left after the party.', correctly uses 'none' as a singular indefinite pronunciation because 'cake' is a singular noun. Hence, 'was', which is a singular verb, is correctly used.
Conversely, sentences with a plural noun require 'none' to take a plural verb. However, that is not what is being asked in this question. The correct option that contains 'none' used in a singular indefinite context is Option B.