As is well-known, the English word ‘caste’ is actually a borrowing from the Portuguese casta, meaning pure breed. The word refers to a broad institutional arrangement that in Indian languages (beginning with the ancient Sanskrit) is referred to by two distinct terms, varna and jati. Varna, literally ‘colour’, is the name given to a four-fold division of society into brahmana, kshatriya, vaishya and shudra, though this excludes a significant section of the population composed of the ‘outcastes’, foreigners, slaves, conquered peoples and others, sometimes refered to as the panchamas or fifth category. Jati is a generic term referring to species or kinds of anything, ranging from inanimate objects to plants, animals and human beings. Jati is the word most commonly used to refer to the institution of caste in Indian languages, though it is interesting to note that, increasingly, Indian language speakers are beginning to use the English word ‘caste’.

Caste system has not spread to which of the following non-Hindu communities of the Indian sub-continent?

Jains

The correct answer is Option 1: Jains

NCERT: "Caste is an institution uniquely associated with the Indian sub-continent. While social arrangements producing similar effects have existed in other parts of the world, the exact form has not been found elsewhere. Although it is an institution characteristic of Hindu society, caste has spread to the major non-Hindu communities of the Indian sub-continent. This is specially true of Muslims, Christians and Sikhs. "