Antonym of CONCEAL

Answer: Option B

Conceal : not allow to be seen; hide.
Unfold : open or spread out from a folded position.
Reveal : make (previously unknown or secret information) known to others.
Open : allowing access, passage, or a view through an empty space; not closed or blocked.
Discover : find unexpectedly or during a search.

Antonym of Conceal is Reveal