I am not aware of such fine details. Suggest you consult a doctor for better guidance.
Is this true
HBA1c should be less than 8
Normal is 4
Above 4 to 8 is type 1 diabetic
Above 8 is high blood sugar
Either to reduce or will be rejected
No. As per my last information, blood sugar does not get checked in medical fitness. Also, you can and should keep your sugar level under control by following the right diet and taking the medicines regularly on time.