The correct option is B Outer ear
The ear is the organ of the sense of hearing, and in mammals is also an organ of balance. In mammals, the ear is has three parts the outer ear, middle ear and the inner ear. The outer ear consists of the auricle or pinna, and the ear canal. The middle ear includes the tympanic cavity and the three ossicles. The inner ear consists of the bony labyrinth which contains the semicircular canals. Therefore, the correct answer is option D.