Q43. Fuel cell, using hydrogen and oxygen as fuels, A. has been used in spaceship B. has as efficiency of $40 \%$ to produce electricity C . uses aluminum as catalysts D . is eco-friendry E . is actually a type of Galvanic cell only Choose the correct answer from the options given below:\\
(1) A, B, D, E only\\
(2) A, D, E only\\
(3) A, B, D only\\
(4) A, B, C only