Which of the following statements is/are True about Shankaracharya ?

$1$. Shankaracharya have founded four math as at Badrinath, Puri, Sringeri and Dwara.

$2$. He travelled across the Indian Sub-continent to propagate his philosophy through discovers and debates with other thinkers.

$3$. He introduced the concept of Dvaita advaita.

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Consider the following statement(s) about Amir Khusrau:
$1.$ He was a disciple (murid) of Nizam-ud-din Auliya.
$2.$ He was the founder of both Hindustani classical music and Qawwali.

Which of the statement(s) given above is/are correct?

Which of the following statements is/are correct?

$1$. Purandar Das a saint from Karnataka, is known as the father of carnatic music.

$2$. He introduced the Raga Mayamalava gowla.

$3$. Tyagaraja the greatest saint, was the composer of carnatic music from Tamil Nadu.

Consider the following statements

$1$. Saint Gyaneshwar propagated Bhakti in Maharashtra.

$2$. He wrote a commentary upon Gita in Marathi language.

$3$. Namder was a staunch devotee of Vishnu.

$4$. Tukaram was the popular saint and founder of Varkari Sect.

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