Final answer:
The nurse should inform the client to have nothing to eat or drink for 4 hours prior to the procedure.
Step-by-step explanation:
The nurse should include the statement: 'You should have nothing to eat or drink for 4 hours prior to the procedure.' This is necessary to ensure that the client's stomach is empty, reducing the risk of aspiration during the procedure. General anesthesia is not typically used during coronary angiography, so statement B is incorrect. Statement C is also incorrect, as there is no known allergy to eggs associated with the procedure. Lastly, statement D is not relevant to coronary angiography, as keeping the affected leg straight is more applicable to procedures like cardiac catheterization.