Explanation:
In India, the Muslim community has the least or minor proportion compared to other communities such as Christian, Hinduism, and Sikh. This can be attributed to several factors including historical, social, and demographic reasons.

Historical Factors:
- India has a long history of diverse religious and cultural practices. Hinduism, the majority religion in the country, has its roots in ancient Indian civilizations.
- Christianity was introduced to India during the colonial period by European traders and missionaries.
- Sikhism, founded in the late 15th century, emerged as a distinct religion in the Punjab region.

Social Factors:
- Hinduism, being the majority religion, has a significant influence on Indian society and culture. Hindu rituals and practices are deeply ingrained in the daily lives of people.
- Christianity and Sikhism have relatively smaller followings in India compared to Hinduism, which may be attributed to their origins and the challenges they faced in establishing themselves in a predominantly Hindu society.
- The Muslim community in India has faced historical challenges, including invasions and conflicts during different periods, resulting in demographic changes in certain regions.

Demographic Factors:
- According to the Census of India 2011, Hindus constitute the majority with 79.8% of the population, followed by Muslims with 14.2%.
- The Christian community accounts for approximately 2.3% of the population, while Sikhs make up about 1.7%.

Conclusion:
Based on historical, social, and demographic factors, the Muslim community in India has the least or minor proportion compared to other communities such as Christian, Hinduism, and Sikh. It is important to note that India is a diverse country with multiple religions coexisting, and the proportions can vary across different regions.