What is the catalyst in the reaction of a primary alcohol with HCl to obtain a chloroalkane?

Anhydrous ZnCl2 Concentrated H2SO4 Red phosphorous Pyridine

Anhydrous ZnCl2

The presence of anhydrous ZnCl2 is to be break the C-O bond in alcohols. ZnCl2 is a Lewis acid and reacts with the oxygen of the alcohol group.