Antonym of TACIT

Answer: Option B

Tacit : understood or implied without being stated.
Order : the arrangement or disposition of people or things in relation to each other according to a particular sequence, pattern, or method.
Written : compose, write, and send (a letter) to someone.
Oral : spoken rather than written; verbal.
Understanding : the ability to understand something; comprehension.

Antonym of Tacit is Written