Final answer:
Cyanosis is clinically significant because it indicates a lack of oxygen in the blood, often due to congenital heart defects or respiratory issues.
Step-by-step explanation:
Liliana's cyanosis is clinically significant because B) It suggests a lack of oxygen in the blood. Cyanosis is a blue or purple coloration of the skin that occurs when there is an insufficient supply of oxygenated blood. This lack of oxygen can happen with congenital heart defects such as tetralogy of Fallot and patent foramen ovale, leading to severe septal defects and the 'blue baby' condition. Other conditions, such as lung diseases or impaired respiratory function, can also lead to cyanosis as they affect the body's ability to oxygenate the blood.