Analyze the following statements regarding pediatric health:
- Neonatal jaundice is common and usually resolves without treatment.
- Cystic fibrosis affects the digestive and respiratory systems.
- Down syndrome is caused by an extra chromosome 21.
- Hydrocephalus is typically managed with antibiotic treatment.
Which of the following options correctly identifies the true statements?
1
Only 1, 2, and 3 are true
2
Only 2, 3, and 4 are true
3
Only 1, 3, and 4 are true
4
Only 1, 2, and 4 are true