What is the correct allocation of oropharyngeal airway sizes for the following groups: adults, children, infants, newborns?

The correct allocation of oropharyngeal airway sizes aligns with the anatomical differences and airway requirements for different age groups.

For adults, the size of the oropharyngeal airway typically used is around 3. This size accommodates the larger airway of an adult. For children, the commonly used size is about 2, which corresponds to their smaller airway anatomy. Infants generally require a size of 1, as their airways are proportionately smaller than those of older children and adults. Newborns also utilize a size of 1 due to their very small airway size.

This means that the allocation of sizes for adults, children, infants, and newborns would indeed follow the sequence of 3: 2: 1: 1, which represents the sizes used for those respective groups. In this framework, the correct option reflects a logical and clinically sound approach to airway management, ensuring that medical personnel utilize the most appropriate size for effective airway management tailored to each group's unique anatomical needs.