Answer: it is sentence number 2
Explanation:
hope it help
Singular noun is a noun that assigns to one thing, one person and one idea. Example: Boy, Girl, Father, Mother, Man, Doctor and so on.
Extrinsic. Extrinsic means not part of the essential nature. But intrinsic means belonging to essential nature.
Since I cant type just one letter, I believe the answer you are searching for is "A"