Concept:Acid test ratio measures liquidity by excluding stock from current assets.Explanation:Acid test ratio=Current liabilitiesCurrent assets−StockCurrent assets = Stock + Debtors + Bank=11,250+18,750+4,000=34,000Subtract stock:=34,000−11,250=22,750Current liabilities = Creditors = 3,750Therefore:3,75022,750=6.07≈6Acid test ratio = 6:1Answer:B. 6:1