This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
Using monopolar cautery is not advised when a child is undergoing circumcision as it may lead to coagulation of penis. The mechanism is 
Select and explain. 
A. Channeling, B. Capacitance coupling, C. Electrocution, D. Explosion
A: Channeling
Answer: A: Channeling 
Explanation: Channelling: Heat is produced wherever the current intensity is greatest. Normally, this would be at the tip of the active electrode, but if current passes up a narrow channel or pedicle to the active electrode, enough heat may be generated within this channel or pedicle to coagulate the tissues. This can prove disastrous, for example:coagulation of the penis in a child undergoing circumcision;coagulation of the spermatic cord when the electrode is applied to the testis.Capacitance coupling: This is a phenomenon in which a capacitor is created by having an insulator sandwiched between two metal electrodes. This can be created in situations where there is a metal laparoscopic po and the diathermy hook is passed through it.Ref: Bailey and Love 27e pg: 103