Concentration of adrenaline used with local anaesthetic: (A) 1:1,000, (B) 1:10,000, (C) 1:1,00000, (D) 1:2,00000
Answer is D. Concentration of adrenaline used for local anaesthetic is 1 in 2 lakhs, (that of phenylephrine is 1 in 20,000).