Final answer:
a. Tetracycline
For lumpy jaw or woody tongue, penicillin is the drug of choice, with alternatives like tetracycline or doxycycline if there's an allergy. Sulfonamides are not typically used for genital yeast infections, which involve different treatments.
Step-by-step explanation:
The drug of choice for treating lumpy jaw, also known as actinomycosis, is penicillin. Lumpy jaw is a bacterial infection caused by Actinomyces species, and penicillin is effective against this type of bacteria. If the patient is allergic to penicillin, other antibiotics such as tetracycline, doxycycline, or macrolides might be used. The treatment for woody tongue, which is similar to lumpy jaw and also known as actinobacillosis, involves the same antibiotics. For genital yeast infections, the initial topical treatment usually involves different medications, and sulfonamides are often not used for such infections. Ivermectin is generally used for parasitic infections, not bacterial ones like lumpy jaw.