A patient asks to have their teeth examined and consents verbally by saying 'yes, go ahead.' This type of consent is:

Correct answer: B. Express consent (verbal or written explicit agreement to a specific procedure)

• A. Implied consent is assumed from actions without explicit statement — e.g., patient extends arm for blood draw.
• B. Correct. EXPRESS CONSENT is an explicit agreement — either VERBAL ('yes, please examine my teeth') or WRITTEN (signed consent form). It is a direct, clear statement of agreement. This is distinct from IMPLIED consent, which is assumed from the patient's actions or circumstances (e.g., a patient sitting in the dental chair and opening their mouth without saying anything implies consent to examination).
• C. Surrogate consent is given by a legal guardian for incapacitated patients — not applicable here.
• D. Informed consent is a PROCESS involving disclosure of information, not just the type of consent.