The ‘P’ dimensionless groups are related as ____

• A. Φ (π1, π2, π3, π4…) = 0
• B. α (π1, π2, π3, π4…) = 0
• C. β (π1, π2, π3, π4…) = 0
• D. µ (π1, π2, π3, π4…) = 0