Which of the following statement(s) is/ are found to be incorrect? I. The first four Gurus of Sikhism established many of the customs and rituals of Sikhism. II. The fourth Guru, Amar Dass, founded the city of Amritsar as a place of Sikh pilgrimage. III. Arjan Dev was the Guru who assembled the verses of Guru Nanak and the first four Gurus into the anthology, AdiGranth, which became the scriptures of the Sikh community.