In the context of electric vehicle batteries, consider the following elements : 1. Cobalt 2. Graphite 3. Lithium 4. Nickel How many of the above usually make up battery cathodes?

The correct option is (c) because Cobalt, Lithium, and Nickel are standard components used in various EV battery cathode chemistries (such as NMC and NCA), while Graphite is the primary material used for the **anode**. Option (d) is the most tempting error as all four are "critical minerals" for EV batteries, but Graphite's specific role is as a negative electrode (anode), not a cathode. This question tests the core concept of the chemical composition and functional components of Lithium-ion batteries.