Synonym of Rookie will be:

Explanation

The correct answer for a synonym of "rookie" is "a new recruit."Explanation of options:An old man: This option does not represent a synonym for "rookie." "Old man" refers to an elderly person, which is unrelated to the concept of a rookie or a new recruit.A new recruit: This is the correct option. A rookie is often referred to as a new recruit, someone who is inexperienced or new to a particular job, activity, or organization.A fighter: While a fighter can be new to a profession or sport, it does not directly represent the same concept as a rookie. A fighter typically refers to someone involved in combat or martial arts, whereas a rookie is a general term for a newcomer.A wrestler: Similar to "fighter," a wrestler refers to someone involved in the sport of wrestling. While a wrestler could be a rookie, the term "wrestler" does not exclusively imply a rookie. It refers to someone who participates in wrestling, whether they are experienced or not.In summary, a new recruit is the most appropriate synonym for "rookie" as it conveys the idea of someone who is new or inexperienced in a particular field or organization.