Select the most appropriate option that can substitute the highlighted segment in the given sentence.
Who is talking in the phone?

Correct option is B

The correct substitution of the highlighted words is (b) on.
Explanation:
The correct preposition with “phone” in such contexts is “on”. We say “talk on the phone,” not in, at, or with.
Grammatical Rule Used:
Certain verbs follow fixed prepositional collocations.
· Talk on the phone
· Talk with someone (person), but not "in" the phone
Example:
She is talking on the phone.
Information Booster:
“On” indicates the medium used for communication.