Concept:The error involves the possessive form of the indefinite pronoun “one”.
Explanation:The error lies in part (b) of the sentence.
The word “ones” should be written as “one’s” to show possession.
“One’s” is the possessive form of the indefinite pronoun “one”.
Unlike personal possessive pronouns (e.g., “its”, “hers”), “one’s” always requires an apostrophe before the “s”.
Without the apostrophe, “ones” simply means “multiple examples” or “people” (e.g., “ripe ones”, “loved ones”).
In the given context, the intended meaning is “the dreams and ambitions belonging to a person”.
Thus, “ones” must be replaced with “one’s”.
The corrected sentence reads: “The greatest glory in life is to be able to realize one's dreams and ambitions without trampling on those of others.”
Answer:(b)