The correct options are
A He promoted peace and brotherhood.
B He promoted the doctrine of the unity of being.
D He died in 1236 CE.
Hazrat Khwaja Moinuddin Chisti established the Chisti Silsila not the Suhrawardi Silsila. He promoted the doctrine of the unity of being, oneness with God. He emphasised the importance of peace and brotherhood among people and advised his followers to respect all religions. He died in 1236 CE and was buried in Ajmer.