_____________ was the first woman to be ordained as a bhikkhuni in the Buddhism.

Correct option is C

(c) Mahaprajapati Gotami
Mahaprajapati Gotami, the Buddha's aunt and foster mother, is known to be the first woman to request and receive ordination from Buddha himself, thus becoming the first bhikkhuni.
Buddhism was founded by Siddhartha Gautama, known as the Buddha, who lived in the 5th-4th century BCE in what is now Nepal and India.
Four Noble Truths:
Dukkha: The truth of suffering.
Samudaya: The truth of the cause of suffering.
Nirodha: The truth of the end of suffering.
Magga: The truth of the path that leads to the end of suffering (the Eightfold Path).