What does the title "green" have to do with your question? Please make more meaningful titles.
The answer is "No, she didn't" or "Yes, she did".
Student or Learner
What is the correct answer for
didn't she know she is pregnant?
Is it no, she didn't or yes, she didn't?
The question should be either:
Doesn't she know she is pregnant?
Didn't she know she was pregnant?
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.