To solve this question, the user needs to have knowledge of the positions in rugby and their corresponding terms.

A winger is a player who typically plays on the sides of the field and is responsible for running down the field and scoring tries.

Now, let's go through each option and explain why it is right or wrong:

A. Flanker: This option is not another term for a winger. A flanker is a position in rugby, but it refers to a forward who plays on the sides of the scrum.

B. Line-Backer: This option is not a term in rugby. A line-backer is a position in American football.

C. Fly-Half: This option is not another term for a winger. A fly-half is a position in rugby who is usually responsible for kicking and passing the ball.

D. Flapper: This option is not another term for a winger. Flapper is not a term used in rugby.

Therefore, the answer to this question is:

The Answer is: A