The answer is parallelism.
The subject of the sentence is her sketches. Also at the beginning of the list it says their unusual perspective so you have to continue using plural pronouns.
The sentence should read: Her sketches are unusual because of their unusual perspective, radical use of color, and their unexpected subjects.
It is true that semantics (a branch of language dealing with the meaning of words) considers both the connotation (the feelings a word evokes in you) and the denotation (the actual meaning of the word) of words.
The correct answer for the question that is being presented above is this one: "Sushashini Pratap's decision to marry Subha." The event that represents a moral dilemma faced by a character in the short story “Subha” by Rabindranath Tagore is that Sushashini Pratap's decision to marry Subha.
D.Correct as is...........
Uh... A.? I would go to sleep XD Sorry... hope this helped!