One who has suddenly gained new wealth, power or prestige

A. Aristocrat

B. Affluent

C. Maverick

D. Parvenu

Answer: Option D

Solution(By Examveda Team)

One word substitute is Parvenu.

Aristocrat: a member of the aristocracy.
Affluent: (especially of a group or area) having a great deal of money; wealthy.
Maverick: an unorthodox or independent-minded person.
Parvenu: a person of humble origin who has gained wealth, influence, or celebrity.