Option 1: Charade -> A pretense or false display, meaning an act or behavior that disguises true intentions.
Option 2: Candor -> Honesty and openness; opposite of masquerade as it implies transparency rather than deception.
Option 3: Frankness -> Being direct and honest; another antonym that contradicts the deceptive nature of masquerade.
Option 4: Foulness -> Refers to something disgusting or wicked; unrelated to the concept of pretense or disguise.
Hence, Option 1: Charade -> Both "masquerade" and "charade" refer to deceptive acts or false pretenses where someone pretends to be something they're not, making them synonymous -> correct