With reference to the religious history of medieval India, the Sufi mystics were known to pursue which of the following practices?
1. Meditation and control of breath.
2. Severe ascetic exercises in a lonely place.
3. Recitation of holy songs to arouse a state of ecstasy in their audience.

Select the correct answer using the codes given below:
a. 2 and 3
b. Only 3
d. 1 and 2
e. All of the above