The correct option is C bold
The word 'timid' refers to showing a lack of courage and confidence.
Option A, dashing refers to someone styling or fashionable.
Option B, outgoing refers to being friendly and socially confident.
Option C, bold refers to someone confident and courageous.
Option D, chivalrous refers to courteous and gallant behaviour of a man especially towards women.
Thus, according to the meaning, the word 'bold' is the opposite of the word 'timid'.