कबीर ने अपने समय के औपचारिक और रूढ़िवादी धर्मों को मुख्य रूप से किस प्रकार चुनौती दी?

The 'Periyapuranam', a 12th-century Tamil work, primarily provides information about whom?

Read the statements (A) and (R) and choose the correct option. Assertion (A): Adi Shankara was an advocate of Advaita, the doctrine of the oneness of the individual soul and the supreme God which is the ultimate reality. Reason (R): He considered the world around us to be an illusion (Maya) and preached the renunciation of the world to attain salvation.