Answer A) A
In the given image:
A – Danger area of neck
B – Pre vertebral space
C – Retropharyngeal space
D – Pretracheal space
Danger area of neck
The danger space is a deep compartment of the head and neck located behind the true retropharyngeal space, extending from the skull base to the mediastinum.
The common name originates from the risk that an infection in this space can spread directly to the thorax, and, due to being a space continuous on the left and right, can furthermore allow infection to spread easily to either side.
anteriorly: alar fascia
posteriorly: prevertebral layer of the deep cervical fascia
inferiorly: posterior mediastinum at the level of the diaphragm