Select the most appropriate meaning of the given Idiom: "A green horn"

A novice

The most appropriate meaning of the idiom "a green horn" is a novice. This idiom comes from the literal meaning of the phrase, which is a young ox or bull with unformed horns. However, the phrase came to be used figuratively to describe someone who is new to a particular activity or situation and does not have much experience.

For example, if you say that someone is "a green horn" at their job, you mean that they are new to the job and do not have much experience. Or, if you say that someone is "a green horn" in love, you mean that they are new to the experience of love and do not know what to do.