Parts of the following sentence have been highlighted and given as options. Select the option that contains an error.
We all know that sugar and honey tastes very sweet.

Correct option is C

Option (c) contains an error.
The subject of the clause “sugar and honey” is a compound subject joined by and, so it requires a plural verb. Therefore, the verb should be taste, not tastes. The other parts— We all know, very sweet—are correct in this context.
Grammatical rule used:
When two singular nouns are joined by and and refer to different persons/things, the subject becomes plural and takes a plural verb (Subject–Verb Agreement).
Example:
“ Bread and jam taste delicious together.” (plural verb with compound subject)
Information booster / exceptions:
· If two nouns joined by and denote one idea/unit (e.g., bread and butter, time and tide), a singular verb may be used: “Bread and butter is my breakfast.”
· If each/every precedes the nouns (e.g., each boy and each girl), take a singular verb: “Each boy and each girl was present.”