Which group 16 element has the highest tendency for catenation? 

Sulphur

The correct answer is option 2. Sulphur.

The tendency for catenation (the ability of an element to form bonds with itself to form long chains or rings) generally decreases down a group. In Group 16, sulfur (S) has the highest tendency for catenation. Therefore, among the options provided: Sulphur (S) has the highest tendency for catenation in Group 16.