Step 1: Understanding the Concept:
The question requires differentiating between the theoretical 'Varna' system and the practical 'Jati' system in Hindu society.
Step 2: Detailed Explanation:
The Varna system is the ancient, four-fold hierarchical classification of society described in Hindu scriptures. The four Varnas are:
1. Brahmin (priests, scholars)
2. Kshatriya (warriors, rulers)
3. Vaishya (merchants, landowners)
4. Shudra (labourers, service providers)
On the other hand, Kushwaha is a \textit{jati} or a specific community/caste. Jatis are the thousands of endogamous social groups that form the practical reality of the caste system. The Kushwaha community is an agricultural caste, typically classified as an OBC. It is a specific caste, not one of the four broad Varna categories.
Step 3: Final Answer:
Kushwaha is a jati (caste), not one of the four Varnas.