Amount of surfactant in the developing lung increases between the 26th and 32nd weeks of gestation. This increase is related to which of the following developmental events?

Surgery

Amount of surfactant in the developing lung increases between the 26th and 32nd weeks of gestation. This increase is related to which of the following developmental events?

A tender swelling in submandibular triangle is mostly likely diagnosed as

In transfacial proportions, the face Is divided into how many segments:

Specific for Ankylosing spondylitis is true?