The correct options are
B Guru Angad Dev
D Guru Amardas
The passing of the Guru Gaddi was not limited to a particular family. Guru Angad Dev was a devoted disciple of Guru Nanak and became the second Guru. Guru Amardas was a disciple of Guru Angad Dev and his deeds made him worthy of becoming the Guru. However, the successor of Guru Amardas was his son-in law, Guru Ram Das. He was succeeded by his son, Guru Arjan Dev.