Which of the following is an acquired organic voice disorder?

Presbylaryngis is an acquired organic voice disorder that typically results from age-related changes in the larynx. As individuals age, their vocal cords undergo structural changes, including thinning, atrophy, and decreased elasticity. These changes can lead to alterations in voice quality, including a breathy or weak voice, hoarseness, or a reduction in pitch range. The term "presbylaryngis" specifically refers to the voice issues that emerge due to these age-related physiological changes in the laryngeal tissue.

In contrast, the other options represent different types of voice disorders. Laryngomalacia is a congenital disorder characterized by the softening of the laryngeal cartilages, causing airway obstruction, particularly in infants. Subglottic stenosis refers to a narrowing of the airway below the vocal cords, which can be either congenital or acquired, often related to airway trauma or prolonged intubation, but it is not classified purely as an organic voice disorder. Puberphonia, on the other hand, is a temporary condition often seen in adolescents who have not transitioned their voice appropriately after puberty, leading to a voice that may pitch higher than expected; this condition is functional rather than organic.

Overall, presby