Pathology Increased levels of haemoglobin A2 is characteristic of A Sickle cell trait B Beta-Thalassaemia trait C Glucose-6-phosphate dehydrogenase deficiency D Alpha-Thalassaemia 💡 Explanation Increased levels of haemoglobin A2 is characteristic of ✓ Correct Answer: B. Beta-Thalassaemia trait