Correct option is D
The correct option to fill in the blank is (d)
are.
Explanation: "Edible flowers" is a plural subject, so it must be followed by the plural verb
are.
Example: Edible flowers are used in various cuisines around the world.
Why other options are incorrect:
· (a) was – Singular past tense, incorrect for plural subject
· (b) were – Plural past tense, but sentence is in present tense
· (c) is – Singular verb, incorrect for plural noun “flowers”
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Information Booster:
✅ Subject-Verb Agreement Rule – Plural subjects take plural verbs (no –s/es in present tense).