#5 is correct; Sikhism deviates from the multi-theist tendencies of strict Hindu beliefs to gather all gods into one; while the connections to Islam and Hindu are significant, Sikhism also collects belief structures from other major religions.
Properly, Sikhism is an example of Syncretism, incorporating beliefs, traditions, and ideals from many religions into a whole.
Sikhism as a religion that was borne out of the interplay between Hindu and Muslim belief, and as a result we can definitely say that there are links between it and these two major religions. The distinct difference is that Sikhs believe the Hindu pantheon of gods and Allah are actually symbols of one supreme being that is their god.
Sikhism describes itself as adhering to neither Hinduism nor Islamism. It describes itself as acknowledging the Muslim Allah and the Hindu Lord of the Universe in the belief that both are one. Sikhs believe in one Supreme Immortal Being. Sikhs practice the rituals of neither the Hindus nor of Islam.
Sikhs largely accept the Hindu cosmology while also adhering to the monotheism that is the essence of Islam. The pantheon of Hindu deities are viewed as spirits ruled by the supreme deity- analogous, perhaps, to angels in Christianity or Islam. The founder of Sikhism, Guru Nanak, was a Hindu who was raised by Muslims. It should be noted that many Sikhs, however, do not accept the notion that their faith is a mixture of Islam and Hinduism, and emphasize that they have their own scriptures, independent of the two other faiths.
How accurate is the view that Sikhism is a blended religion and not a religious innovation?