Explanation:

‘Gurudwara reform movement’ gained momentum in the period 1920-25.
The Akali movement or the Gurdwara Reform Movement was a campaign to bring reform in the gurdwaras (the Sikh places of worship) in India during the early 1920s. The movement led to the introduction of the Sikh Gurdwara Bill in 1925, which placed all the historical Sikh shrines in India under the control of Shiromani Gurdwara Parbandhak Committee (SGPC).
The Akalis also participated in the Indian independence movement against the British Government, and supported the non-cooperation movement against them.