The correct answer is (D) Deceit; deliberate deceptiveness; double-dealing; deceitfulness in speech or conduct; speaking or acting in two different ways about the same matter in order to deceive; thinking one thing while saying another.

Duplicity comes from Middle English duplicite, French duplicité, Latin duplicitas, Duplicitatem.

Examples of use:

• Once his classmates discovered his duplicity, he became unpopular.
• The work of a spy requires him to maintain a high level of duplicity.