Final answer:
The signs of meningitis in infants less than 12 months of age include fever and irritability, poor feeding and vomiting, and bulging fontanelle. All of these signs can occur in infants with meningitis.
Step-by-step explanation:
The signs of meningitis in infants less than 12 months of age include:
- Fever and irritability: Infants with meningitis may have a high fever and appear more irritable than usual.
- Poor feeding and vomiting: They may have difficulty feeding, refuse to eat, or vomit frequently.
- Bulging fontanelle: The fontanelle, or soft spot on the baby's head, may become tense or bulging.
Therefore, the correct answer is 4) All of the above as all of these signs can occur in infants with meningitis.