Socrates was the Greek philosopher who believed in teaching by asking questions instead of giving speeches and believed that an "unexamined life is not worth living". So the correct option in regards to the given question is option "A".
Socrates is a classical Greek philosopher who has been given
the credit for being the founder of western philosophy. He is mainly known to
people via the writings of his two great students Pluto and Xenophon. In the field
of ethics, Socrates is renowned for his contributions.
