A metal pot with hot soup in it is placed on a cool stone countertop, as shown in the diagram below.



The numbered arrows show the transfer of heat from the pot of soup to the surrounding environment. Which list correctly identifies each method of heat transfer?

a
1 — convection; 2 — conduction; 3 — radiation
b
1 — convection; 2 — conduction; 3 — conduction
c
1 — radiation; 2 — radiation; 3 — convection
d
1 — conduction; 2 — convection; 3 — radiation

d

1 — conduction; 2 — convection; 3 — radiation