Antonym of TRANSPARENT

Answer: Option C

Transparent : (of a material or article) allowing light to pass through so that objects behind can be distinctly seen.
Coloured : having a colour or colours, especially as opposed to being black, white, or neutral.
Childlike : (of an adult) having the good qualities, such as innocence, associated with a child.
Opaque : not able to be seen through; not transparent.
Imminent : about to happen.

Antonym of Transparent is Opaque