Step 1: Understanding Section 72 IPC.
Section 72 applies when a single act falls under two or more offences but it is unclear which specific offence has been committed.
Step 2: Rule of proportional justice.
The law requires that, in such circumstances, punishment must be based on the offence carrying the \textit{least} severe penalty. This protects the accused from harsher penalties when ambiguity exists.
Step 3: Applying the principle.
Thus, the court imposes the minimum punishment possible among the options. This is the fairest approach under criminal jurisprudence.