No need to be quiet about picking B. "Reticent" suggests a dislike of talking about your own business. ("My neighbor was reticent about her job.") "Silent," meanwhile, implies a habit of never saying more than you must. ("He's a silent person who leads by example.") "Taciturn," another synonym, suggests that by nature you dislike talking and may also refer to being alone. ("She was a taciturn farmer who did not welcome visitors.") And "reserved" implies that you are rigid and quiet during conversation. ("The reserved couple did not join in the discussion.")