6619. Every body laughed at the puerility of his statement

✅ The correct answer is option B.
Inaccuracy : the quality or state of not being accurate.

Childishness : of, like, or appropriate to a child.

Insincerity : the quality of not expressing genuine feelings.

Falsehood : the state of being untrue.

Puerility : childishly silly and immature.

Synonym of Puerility is Childishness