Electrolysis of water containing sulfuric acid as an electrolyte is carried out as shown and the gas — Electrochemistry Chemistry Question

Electrolysis of water containing sulfuric acid as an electrolyte is carried out as shown and the gases produced at the electrodes collected in two identical tubes, both initially filled with the sulfuric acid solution. After electrolysis has been carried out for a certain time, which picture best represents the appearance of the tubes?