Correct option is A
· The phrase "superior than" is incorrect. The correct phrase is "superior to."
· Correct sentence: "Ram is superior to Shyam in his vision of a corruption-free India."
· Rule: Words like senior, junior, superior, inferior, prior always take "to" instead of "than."
Example :She is junior to me in this company.She is junior than me in this company. (Incorrect)