Alexander Kerensky was the head of the Provisional Government in Russia before the October Revolution. This means that option 1 is the correct answer.

Option 2, which states that Kerensky was a close confidant of Lenin, is incorrect. In reality, Kerensky and Lenin were political rivals, and Kerensky`s Provisional Government was overthrown by Lenin`s Bolsheviks in the October Revolution.

Option 3, which suggests that Kerensky was the head of the Czar`s army, is also incorrect. While Kerensky did serve as Minister of War in the Provisional Government and held some influence over the military, he was not the ultimate leader of the army.

Option 4, claiming that Kerensky was an advisor of Joseph Stalin, is also false. Stalin did play a role in the Bolshevik`s seizure of power, but he did not have a close relationship with Kerensky.

In conclusion, Alexander Kerensky was indeed the head of the Provisional Government in Russia before the October Revolution.