Which of the following statements about the Shiromani Gurudwara Prabandhak Committee (SGPC) are correct?
1. It began as the political wing of the Singh Sabhas in the late 19th century.
2. It was formed in 1920 as part of the upcoming Akali movement.
3. It was founded to reclaim control of the Sikh shrines from the government manipulated loyalist committees.
4. It formed the Akali Dal to coordinate groups (Jathas) to reclaim control of the shrines.
Select the correct answer using the code given below.