Marginal ridges are evident on both the mandibular and maxillary incisors.

Which one of the following statements about the heart rhythm of ventricular fibrillation is TRUE?

A) "When a patient's heart is in ventricular fibrillation, it is unable to pump blood throughout the body." B) "The AED is designed to identify ventricular fibrillation and give a 'No shock advised' message when it is present." C) "The most effective treatment for converting ventricular fibrillation to a healthy heart rhythm is CPR." D) "Ventricular fibrillation occurs when the heart rate is so slow and weak that a pulse cannot be felt."

Multirooted teeth and teeth with multiple root canals pose a challenge for endodontic radiographic techniques because intraoral radiographs are a two-dimensional recording of three-dimensional structures

A) Both the statement and reason are correct and related. B) Both the statement and reason are correct but not related. C) The statement is correct, but the reason is not. D) The statement is not correct, but the reason is correct. E) Neither the statement nor the reason is correct.