What is your job?

Q: What is your job?
A1: My job is a doctor.
A2: My job is medical profession as a doctor.
A3: My job is to help sick people.
A4: My job is teaching.
Please correct the above and comment.

I think the following is better:
Q: What is your occupation?
A1: I am a doctor/physician.
A2: I’m a doctor by profession.
A3: I’m occupied with helping sick people.
A4: My occupation is teaching.