Milinda was not a contemporary of the other three. Bimbsara, Gautama Buddha, and Prasenjit were all historical figures who lived during the same period in ancient India. Bimbsara was a king of Magadha, Gautama Buddha was the founder of Buddhism, and Prasenjit was another king who ruled in the same region. Milinda, on the other hand, refers to King Menander I, also known as Milinda or Menander of Bactria, who ruled in the 2nd century BCE, which was several centuries after the time of Bimbsara and Gautama Buddha.