If $$\left(m_i, \dfrac{1}{m_i}\right), i=1, 2, 3, 4$$ are concyclic points then the value of $$m_1m_2m_3m_4$$ is?
  • A
    $$1$$
  • B
    $$-1$$
  • C
    $$0$$
  • D
    $$\infty$$

Solution