Which of the following is a landmark of the middle ear?

• A. Pinna, external acoustic meatus, tympanic membrane
• B. Malleus, umbo, manubrium, short process
• C. Cochlea, vestibule, semicircular canals
• D. Eustachian tube, labyrinth

Answer: (B)

The middle ear landmarks center on the first ossicle and how it connects to the tympanic membrane. The malleus is the hammer-shaped bone, and its handle, called the manubrium, is firmly attached to the tympanic membrane. The umbo is the deepest point of the tympanic membrane where that handle pulls inward, making it a key reference point. The short process is a small projection of the malleus that helps connect with the incus. Together, these features—the malleus with its manubrium and short process, and the umbo—define recognizable middle ear landmarks. In contrast, the other options point to external ear structures (the pinna and external auditory canal) or inner ear structures (the cochlea and labyrinth), with the Eustachian tube related to middle ear function but not a landmark like these ossicular features.