The correct answer is option 'B' - Malavikagnimitra

Introduction:
Malavikagnimitra is a Sanskrit play written by the ancient Indian poet Kalidasa. It is considered one of the finest works of classical Sanskrit literature. The play tells the love story of King Agnimitra, the son of Pushyamitra Sunga, the founder of the Sunga dynasty.

Summary of the plot:
The play revolves around the romantic relationship between King Agnimitra and Malavika, a beautiful and talented dancer in the royal court. Agnimitra sees Malavika during a performance and is instantly captivated by her beauty and grace. He falls in love with her and desires to make her his queen.

However, there are obstacles in their path to love. Malavika is already in love with another courtier named Madhavasena. Agnimitra's chief queen, Queen Dharini, is also jealous of Malavika and tries to manipulate the situation to her advantage.

Key characters:
1. King Agnimitra: The young and passionate ruler of the Sunga dynasty, who falls in love with Malavika.
2. Malavika: A talented dancer in the royal court, who captures the heart of King Agnimitra.
3. Madhavasena: A courtier who is in love with Malavika.
4. Queen Dharini: Agnimitra's chief queen, who is jealous of Malavika and tries to create obstacles in her path.

Themes explored:
1. Love and romance: The play explores the power of love and the complexities of romantic relationships.
2. Jealousy and manipulation: The character of Queen Dharini represents the negative aspects of human nature, such as jealousy and manipulation.
3. Courtly life and politics: The play also provides insights into the courtly life and politics of ancient India.

Conclusion:
Malavikagnimitra is a timeless classic that showcases the brilliance of Kalidasa's writing and his ability to captivate the audience with his storytelling. The love story of Agnimitra and Malavika, set against the backdrop of courtly life and politics, continues to enchant readers and audiences even today.