C2h5oh is able to dissociate in water to conduct an electric current. this compound could be classified as

The fact that when in solution C₂H₅OH conducts electricity means that it is an electrolyte so you can automatically cross out A and C (the definition of an electrolyte is a substance that will conduct electricity when in a solution).  I think the correct answer is B due to the -OH group (the - indicates a covalent bond) which allows the molecule to give up a proton (H⁺).
 I hope this helps.  Let me know if anything is unclear.