From the given options, select the one which can replace the given expression:

One who is new and inexperienced in a certain job

Novice

The term that can replace the given expression "One who is new and inexperienced in a certain job" is Novice. (Option 4)

Explanation of all four options:

Versatile: Having the ability to adapt or be used for various purposes. This term is unrelated to someone who is new and inexperienced in a specific job.

Veteran: A person who has a lot of experience in a particular field or activity. This term is the opposite of what is described, as it refers to someone with extensive experience.

Namesake: A person or thing with the same name as another. This term is unrelated to someone who is new and inexperienced in a certain job.

Novice: One who is new and inexperienced in a particular job or activity. This term is the correct match for the given expression.