The correct answer is A. Alara Kalama.
Alara Kalama was a Hindu sage and philosopher who lived in the 6th century BCE. He was one of the first teachers of Gautama Buddha, who later became the founder of Buddhism. Alara Kalama taught Gautama Buddha about the nature of reality and the path to enlightenment.
Kalidasa was a Sanskrit poet and dramatist who lived in the 5th century CE. He is considered one of the greatest writers in the history of Indian literature. His works include the plays “Shakuntala” and “Abhijnanashakuntalam,” as well as the poems “Meghaduta” and “Raghuvamsa.”
Viswamitra was a Vedic sage who is mentioned in the Rig Veda. He is said to have been a king who renounced his kingdom to pursue a life of asceticism. He is also said to have been the teacher of Rama, the hero of the Ramayana.
Vashistha was a Vedic sage who is mentioned in the Rig Veda. He is said to have been the son of Brahma, the creator god. He is also said to have been the teacher of Rama, the hero of the Ramayana.
Alara Kalama was the master of Gautama Buddha because he was the first teacher to teach Gautama Buddha about the nature of reality and the path to enlightenment.