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Hello, teachers!

Would you please check this short dialog and tell me if these are all acceptable?

A; Do you happen to know how often it happens?
B; [_________]
1. I'm not informed enough about that.
2. I've not been informed enough about that.
3. I don't have enough information about that.

Thank you very much.
Peace!
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Hi Jandi,

I'm not sure what you are trying to do here. All answers are grammatically correct, but none are conversationally natural; it would more likely go like this:

A: 'Do you happen to know how often it happens?'
B: 'Afraid not.'
Comments  
Sorry for my stupid question, and thank you for your kind help!

Enjoy the constant chirping of the crickets!