Percentage of adrenaline with lignocaine for local infilteration is?

Ans. is 'd' i.e., 1:50000 The most common concentrations of epinephrine combined with local anaesthetics are 1:50,000 (0.02 mg/ml), 1:100,000 (0.01 mg/ml) and :200000 (0.005 mg/ml). The 1:50000 concentration is manufactured in combination with 2% lidocaine. The 1:100,000 concentration is manufactured in combination with 2% lidocaine and 4% aicaine. The 1:200,000 concentration is manufacture in combination with 4% prilocaine, 4% aicaine and 0.5% bupivacaine