QUES:
Who is they in the following sentence?

Medics have a tough job of trying to heal the wounded since they normally have to fix them in hostile environments.

OPTIONS:
- Medics
- the wounded

ANS:
Medics

QUES:
Who is he in the following sentence?

The man asked Mark the question again because he was curious.

OPTIONS:
- The man
- Mark

ANS:
The man

QUES:
Who is they in the following sentence?

Professors do a lot for students, but they are rarely thankful.

OPTIONS:
- Professors
- students

ANS:
students