The option "1 and 2" is correct because both the Chapchar Kut festival and the Khongjom Parba ballad are integral to the cultural heritage of their respective states, Mizoram and Manipur. Chapchar Kut is a significant festival marking the end of the bamboo-cutting season in Mizoram and reflects the customs and traditions of the Mizo people. Similarly, the Khongjom Parba is a traditional ballad in Manipur that commemorates the valor of the Manipuri soldiers during the Anglo-Manipur War, underscoring the importance of oral history and cultural expression. This knowledge is essential for the UPSC Prelims, as it enhances understanding of India's diverse regional cultures and their historical significance.