Final answer:
The signs of classical vitamin K deficiency in newborns include jaundice, bleeding from the umbilical cord or circumcision site, and easy bruising.
Step-by-step explanation:
The signs of classical vitamin K deficiency in newborns include:
- Jaundice: Excessive bilirubin levels in the blood can cause yellowing of the skin and eyes.
- Bleeding from the umbilical cord or circumcision site: Vitamin K is necessary for blood clotting, so a deficiency can lead to abnormal bleeding from these areas.
- Easy bruising: Vitamin K plays a role in the production of clotting factors, so a deficiency can result in easy bruising.
Therefore, the answer to the question is 4) All of the above