Metal used as catalyst in the hydrogenation of vegetable oils

Given data:

To find the metal used as catalyst in the hydrogenation of vegetable oils from the given options

Concept to be used:

Catalysis

Detailed Solution:

Nickel as catalyst binds both the Hydrogen and the unsaturated substrate and facilitates their union which leads to the mechanism of hydrogenation of oil while other given element are unable to do so.

Nickel is used for most reaction as the catalyst because of it is much cheaper to run the reaction with, in the commercial world, cost-effectiveness is the best and a desired pathway.

Therefore, Option C is the correct answer.