I'm with Absinth.

The facia pictured is definitely to suit a plain jane heater without the forced air option. So I'm going with C.

The facia to suit 'forced air' has extra markings on the bottom row, where 'zero' is just left of centre.

Byron, the plain heater/demister & the 'forced air option', both have a fan.

BTW Les, as wbute has pointed out, that picture is reversed, which makes it a little to more difficult to fathom.

Dr Terry