The correct answer is option 'B', Raja Ravi Verma.

Raja Ravi Verma, a renowned Indian painter from the 19th century, was indeed the first artist to paint a Nuclear Family. Ravi Verma is considered one of the greatest painters in the history of Indian art and is often referred to as the Father of Modern Indian Art.

Raja Ravi Verma's artistic style was influenced by both Western academic art and Indian traditions. He is known for his ability to portray mythological and historical scenes with great realism and attention to detail. However, in addition to these subjects, Ravi Verma also depicted scenes from everyday life, including portraits and genre paintings.

In the late 19th century, Raja Ravi Verma started painting scenes depicting the idealized domestic life of a Nuclear Family. These paintings showcased a husband, wife, and their children engaged in various activities, such as playing, reading, or simply spending time together. Ravi Verma's portraits of Nuclear Families were significant because they represented a departure from the traditional Indian art, which primarily focused on religious and mythological themes.

Ravi Verma's portrayal of the Nuclear Family was not only artistically groundbreaking but also socially significant. During that time, Indian society was undergoing changes due to the influence of British colonialism and the spread of Western values. The concept of the Nuclear Family, with its emphasis on individualism and privacy, was seen as a reflection of these changing social norms.

Raja Ravi Verma's paintings of the Nuclear Family were widely appreciated and became popular among the Indian middle class. His art played a crucial role in shaping the visual representation of the ideal Indian family in the modern era. His work paved the way for other artists to explore similar themes and contributed to the development of a distinct Indian art style.

In conclusion, Raja Ravi Verma was the first artist to paint a Nuclear Family. His portrayal of the idealized domestic life of a Nuclear Family was artistically groundbreaking and socially significant, reflecting the changing social norms of 19th-century India. His paintings continue to be celebrated for their realism, attention to detail, and contribution to the development of modern Indian art.