What is callout?
(a) It is a drawing of (part of) a product’s visual display when it is in a particular state
(b) It is a note attached to a line or arrow picking out part of a diagram
(c) All of the mentioned
(d) None of the mentioned
I had been asked this question by my school principal while I was bunking the class.
Query is from Designing with State Diagrams topic in chapter Unified Modelling Language of Software Architecture