  The long-lived singlet states are useful to study a variety of interesting
quantum phenomena. In this work we study electromagnetically induced
transparency using a two-qubit system. The singlet state acts as a `dark state'
which does not absorb a probe radiation in the presence of a control radiation.
Further we demonstrate that the simultaneous irradiation of probe and control
radiations acts as a dynamical decoupling preserving the singlet state at
higher correlation for longer durations.
