Which of the following are recommended safe work practices when recovering refrigerants?
a) wear safety eyewear and butyl-lined gloves when connecting/disconnecting hoses.
b) wear a respirator when working with any refrigerant.
c) wear cotton gloves when working with any compressed gas.
d) ventilation is only necessary if oil, appearing as a white cloud or fog, is emitted during the recovery procedure.

A) Wear safety eye wear and butyl-lined gloves when connecting/disconnecting hoses.

Explanation:

Refrigerants are chemicals which are used in refrigerators to cool an item, basically a chemical formula which provides the ability to cool down.

Butyl-lined gloves are hard and do not get cool immediately, and that is why those gloves shall be used, also safety eye wear shall also be worn, as this will help to avoid the reaction of chemical in eyes, as the chemical might cause irritation in eyes.

answer; read and consider the content of the items;