What type of topical anesthetic should be avoided if a patient has a prior sensitivity to Iodine?

The correct choice is Betadine, which is a topical antiseptic that contains iodine as its active ingredient. In patients with a known sensitivity or allergy to iodine, the use of Betadine could trigger an allergic reaction, which might lead to symptoms such as rash, itching, or more severe responses depending on the individual's sensitivity level.

In contrast, lidocaine and benzocaine are both local anesthetics that do not contain iodine and would not pose a risk for a patient with an iodine sensitivity. Gel is a generic term that can refer to various types of topical agents, including those that could be safe for such a patient depending on their specific formulation. Therefore, it is crucial to avoid iodinated products like Betadine in individuals with a history of sensitivity to iodine to prevent adverse reactions.