Final answer:
Nasal polyps are indicative of cystic fibrosis in young children, as the disease causes thick mucus accumulation that leads to chronic inflammation and growths in the nasal passages.
Step-by-step explanation:
The nasal condition in young children that is suggestive of cystic fibrosis is B. nasal polyps. Cystic fibrosis is an autosomal recessive genetic disease characterized by the production of thick and sticky mucus that can clog respiratory and digestive organs. This can cause frequent lung infections and malabsorption of nutrients. Nasal polyps can occur due to chronic inflammation thanks to the accumulation of thick mucus in the nasal passages. In individuals with cystic fibrosis, these growths may develop at a young age, and their presence is often an indication of the disease.