The steps in the melting of an ice-cream bar kept beside a bonfire are listed below:

Step 1: Heat from the bonfire travels to the ice-cream bar
Step 2: Heat travels from one part of the ice-cream bar to the other parts

Which statement is true?

Heat is transferred by convection in Step 1 and by radiation in Step 2.
Heat is transferred by radiation in Step 1 and by convection in Step 2.
Heat is transferred by conduction in Step 1 and by radiation in Step 2.
Heat is transferred by radiation in Step 1 and by conduction in Step 2.