Air pockets in a sample placed in the capillary tube will result in:

a$)$ a lower mp since air is a poor heat conductor.

b$)$ an elevated $mp$ since air is a poor heat conductor.

c$)$ an elevated mp since air is a good heat conductor.

d$)$ a lower mp since air is a good heat conductor.

e$)$ no $mp$ at all since air prevents samples from melting.