Who was appointed the preceptor to succeed Baba Guru Nanak?

Guru Angad

The correct answer is Option (3) → Guru Angad

Baba Guru Nanak organised his followers into a community. He set up rules for congregational worship (sangat) involving collective recitation. He appointed one of his disciples, Angad, to succeed him as the preceptor (guru), and this practice was followed for nearly 200 years.