Select the most appropriate option to improve the bold part of the sentence.
I came to know this from a friend.
Show answer & explanation
Correct answer: A
Explanation
The most appropriate option to improve the bold part of the sentence is to know this through.
"Through" vs. "From": While "from a friend" is common in casual speech, the preposition through is often preferred in formal English when describing the channel or medium by which information is conveyed.
Other options:
to know that from: Using "that" instead of "this" changes the focus and doesn't inherently improve the grammatical structure.
to know of it from: This implies knowing about the existence of something rather than learning the specific information itself.
to know it by: This is grammatically incorrect in this specific context of receiving information from a person.