The great exponent of Mahayana Buddhism was

The correct answer is: C. Nagarjuna

Nagarjuna was an Indian Buddhist philosopher who lived in the 2nd century CE. He is considered to be one of the most important figures in the development of Mahayana Buddhism. Nagarjuna is best known for his work on the Madhyamaka philosophy, which is a system of thought that emphasizes the emptiness of all phenomena.

Ashvaghosa was an Indian poet and dramatist who lived in the 1st century CE. He is best known for his work on the Buddhacarita, which is an epic poem about the life of the Buddha.

Vasubandhu was an Indian Buddhist philosopher who lived in the 4th century CE. He is best known for his work on the Abhidharma, which is a system of Buddhist philosophy that deals with the nature of reality.

Nagasena was an Indian Buddhist monk who lived in the 1st century BCE. He is best known for his work on the Milindapanha, which is a dialogue between the monk Nagasena and the Greek king Menander.

Here is a brief explanation of each option:

• Ashvaghosa was an Indian poet and dramatist who lived in the 1st century CE. He is best known for his work on the Buddhacarita, which is an epic poem about the life of the Buddha. Ashvaghosa was not a philosopher, and he did not make any significant contributions to Mahayana Buddhism.
• Vasubandhu was an Indian Buddhist philosopher who lived in the 4th century CE. He is best known for his work on the Abhidharma, which is a system of Buddhist philosophy that deals with the nature of reality. Vasubandhu was a significant figure in the development of Mahayana Buddhism, but he was not the great exponent of Mahayana Buddhism.
• Nagarjuna was an Indian Buddhist philosopher who lived in the 2nd century CE. He is considered to be one of the most important figures in the development of Mahayana Buddhism. Nagarjuna is best known for his work on the Madhyamaka philosophy, which is a system of thought that emphasizes the emptiness of all phenomena. Nagarjuna is the great exponent of Mahayana Buddhism.
• Nagasena was an Indian Buddhist monk who lived in the 1st century BCE. He is best known for his work on the Milindapanha, which is a dialogue between the monk Nagasena and the Greek king Menander. Nagasena was a significant figure in the development of Mahayana Buddhism, but he was not the great exponent of Mahayana Buddhism.