in the context of electric vehicle batteries, consider the following elements: Cobalt Graphite Lithium Nickel ,UPSC

 GENERAL STUDIES

3.in the context of electric vehicle batteries, consider the following elements:

1. Cobalt 

1. Graphite 

1. Lithium 

1. Nickel 

How many of the above usually make up battery cathodes?

(A) Onle one

(B) Only two

(C) Only three

(D) All the four

Answer -(c) only three