The number of possible alkynes (strucutral only) for the compound having molecular formula `C_(3)FCIBrL` is:

Answer

D

Explanation

(1)`Cl-undersetunderset(Br)(|)oversetoverset(F)(|)(C)-C-=(C)-l`
(2)`Cl-undersetunderset(I)(|)oversetoverset(F)(|)(C)-C-=C-Br`
(C )`Br-undersetunderset(I)(|)oversetoverset(F)(|)(C)-C-=C-Cl`
(4)`Br-undersetunderset(I)(|)oversetoverset(Cl)(|)(C)-C-=C-F`