In electrolysis, the amount of mass deposited or liberated

In electrolysis, the amount of mass deposited or liberated at an electrode is directly proportional to

1. square of electric charge
2. amount of charge
3. square of current
4. concentration of electrolyte

By Faraday's Ist Law
Amount deposited (m) = Zit = Zq
Amount deposited is directly proportional to charge.