The constellation `Sapta Rishi` is known as the Big Dipper to Westerners. The Big Dipper is one of the most recognizable star patterns in the night sky. It consists of seven bright stars that are arranged in the shape of a ladle or a dipper. In Hindu mythology, these seven stars are believed to represent the seven sages or Rishis. Hence, the name `Sapta Rishi` which means `Seven Sages` in Sanskrit. Option 1, Seven Monks, is not correct as it does not correspond to the constellation `Sapta Rishi`. Similarly, option 2, Alpha Centauri and option 4, Small Bear, are also incorrect as they are different constellations altogether. So, the correct answer is option 3, Big Dipper.