Explanation:

Section 37 of Indian Penal Code, Illustrations (b) and (c) –
37. Co-operation by doing one of several acts constituting an offence. When an offence is committed by means of several acts, whoever intentionally cooperates in the commission of that offence by doing any one of those acts, either singly or jointly with any other person, commits that offence.
(b) A and B are joint jailors, and as such have the charge of Z, a prisoner, alternatively for six hours at a time. A and B, intending to cause Z’s death, knowingly cooperate in causing that effect by illegally omitting, each during the time of his attendance, to furnish Z with food supplied to them for that purpose, Z dies of hunger. Both A and B are guilty of the murder of Z. (c) A, a jailor, has the charge of Z, a prisoner. A, intending to cause Z’s death, illegally omits to supply Z with food in consequence of which Z is much reduced in strength, but the starvation is not sufficient to cause his death. A is dismissed from his office, and B succeeds him. B, without collusion or co-operation with A, illegally omits to supply Z with food, knowing that he is likely thereby to cause Z’s death. Z dies of hunger. B is guilty of murder, but, as A did not co-operate with B. A is guilty only of an attempt to commit murder