Which Statement Concerning the Proton Exchange Membrane Fuel Cell Is

Multiple Choice

Which statement concerning the proton exchange membrane fuel cell is not correct?

A) At the anode, hydrogen gas is reduced to form water.
B) At the cathode, oxygen is reduced to water.
C) The cell uses platinum as a catalyst.
D) The actual fuel cell reaction causes no pollution of any kind.
E) A limiting factor is the cost of producing hydrogen as the fuel.