Step 1: Understanding the Four Yugas.
Hindu cosmology describes the Four Yugas as the four ages that constitute the entire cycle of creation: - A. Treta: The second age, characterized by virtue and righteousness. - C. Sat: The first and golden age, characterized by truth and purity. - D. Kali: The current age, characterized by conflict, strife, and moral decline. - B. Dwarak: This is not traditionally considered one of the Four Yugas.
Step 2: Conclusion. The correct Yugas are A, C, and D.
Final Answer: \[ \boxed{\text{The correct answer is 4. A, C and D only.}} \]