Correct option is D
The IUPAC group prefix for acyl halide compounds is "halocarbonyl."
Alkoxycarbonyl: Refers to esters, not acyl halides.
Carbamoyl: Related to urea derivatives, not acyl halides.
Cyano: Represents nitriles, which contain a carbon triple-bonded to a nitrogen atom, unrelated to acyl halides.