Explanation:

A fuel cell is a device that produces electric energy, through a chemical reaction. Fuel cells use a positively charged ion (Hydrogen) and an oxidizing agent (oxygen). There are many types of fuel cells, but they all consist of a cathode, an anode, and an electrolyte that allows positively charged (hydrogen) ions to move between the two sides of the fuel cell. They differ from batteries as they (fuel cells) require the continuous supply of fuel. Both batteries and fuel cells produce direct current (D.C). Hence option 2nd is correct.