According to Jaina tradition, Mahavira was preceded by how many other teachers or 'tirthan- karas'?

Twenty-three

The correct answer is Option (2) → Twenty-three

The basic philosophy of the Jainas was already in existence in north India before the birth of Vardhamana, who came to be known as Mahavira, in the sixth century BCE. According to Jaina tradition, Mahavira was preceded by 23 other teachers or Tirthankaras – literally, those who guide men and women across the river of existence.