This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infeility (Eggs'plantation!), Subject name: Gynaecology & Obstetrics
World Health Organization 2010 criteria for morphology (strict criteria) for semen analysis includes - 
Select and explain. 
A. >15% normal forms, B. >=4% normal forms, C. >=25% normal forms, D. >=32% normal forms
B: >=4% normal forms
Answer: B: >=4% normal forms 
Explanation: Normal Semen Analysis: World Health Organization 2010 Guideline Volume >=1.5 mL Sperm concentration >=15 million/mL Total sperm number >= 39 million/ ejaculate Sperm motility >40%motile, >32%progressive Morphology >=4% normal forms (kruger's strict criteria) Vitality 58 % White blood cells <1 million/mL Immunobead/Mixed antiglobulin Reaction <50% coated with antibodies reaction