What was Lala Lajpat Rai demonstrating against when he succumbed to police brutality?

Answer: Option C

Simon commission was appointed to report the working of the existing government, it was a six Members commission under the chairmanship of John Simon and it did not consist a single Indian member. Hence, Congress decided to boycott the commission. Lala ji who led the movement in Lahore was Severely injured by lathi charge.