This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Which of the following is not a secondary granule: 
Select and explain. 
A. Lactoferrin, B. Alkaline phosphatase., C. BPI, D. Lysozyme
C: BPI
Answer: C: BPI 
Explanation: Specific (secondary) granules

Lactoferrin
Alkaline phosphatase
Type IV phosphatase
Leucocyte adhesion molecules
Plasminogen activator
Phospholipase A2

Azurophilic (primary) granules

Myeloperoxidase
Lysozyme-Bactericidal factors
Acid hydrolase
Elastases
Nonspecific collagenase
BPI
Defensins
Cathepsins G
Phospholipase A2