The predominant religion in Haryana is:

Hinduism
Islam
Sikhism
Christianity

The correct answer is Hinduism. Hinduism is the predominant religion in Haryana, with 87.4% of the population identifying as Hindu. Islam is the second largest religion, with 8.7% of the population identifying as Muslim. Sikhism is the third largest religion, with 2.3% of the population identifying as Sikh. Christianity is the fourth largest religion, with 0.8% of the population identifying as Christian.

Hinduism is the oldest major religion in the world, with a history of over 4,000 years. It is a polytheistic religion, with a belief in many gods and goddesses. The most important Hindu deity is Vishnu, who is the preserver of the universe. Other important Hindu deities include Shiva, the destroyer of the universe; Brahma, the creator of the universe; and Lakshmi, the goddess of wealth and prosperity.

Islam is a monotheistic religion, with a belief in one God. The most important figure in Islam is Muhammad, who is considered to be the last prophet of God. The holy book of Islam is the Quran, which Muslims believe is the word of God. The five pillars of Islam are Shahadah (the declaration of faith), Salat (prayer), Zakat (almsgiving), Sawm (fasting during Ramadan), and Hajj (pilgrimage to Mecca).

Sikhism is a monotheistic religion, with a belief in one God. The most important figure in Sikhism is Guru Nanak Dev Ji, who is considered to be the first Guru of Sikhism. The holy book of Sikhism is the Guru Granth Sahib, which Sikhs believe is the word of God. The five pillars of Sikhism are Naam Japna (meditation on the name of God), Kirat Karona (honest living), Vand Chhakna (sharing with others), Ishnaan (bathing), and Simran (remembrance of God).

Christianity is a monotheistic religion, with a belief in one God. The most important figure in Christianity is Jesus Christ, who is considered to be the Son of God. The holy book of Christianity is the Bible, which Christians believe is the word of God. The two main branches of Christianity are Catholicism and Protestantism.