Assertion(A): Procaine and Lidocaine are local anaesthetics and cause loss of sensation in the area in which it is applied without losing consciousness.
Reason (R): They block pain perception that is transmitted via peripheral nerve fibres to the brain.
(a) Both A and R are correct and R explains A.
(b) Both A and R are correct but R does not explain A.
(c) A is correct but R is wrong.
(d) A is wrong but R is correct.