This is the 9719th most frequent Korean word.
고르라는
"고르라는" means "to choose" or "to select" (imperative or suggestive form depending on context).
In this sentence, "고르라는" is used as a form of the command or request verb for 'to choose' directed from the teacher.
선생님이 몇 가지 옵션을 고르라는 지시를 하셨습니다.
The teacher instructed us to choose a few options.
Here, "고르라는" conveys a suggestion or advice to choose something with care, attributing the advice to another person.
그림을 잘 고르라는 말을 들어서 신중히 살펴보았다.
I was told to choose the picture carefully, so I examined it closely.
In this example, "고르라는" denotes a conditional expectation based on following instructions for choosing.