The Quantum dot cellular Automata technology is used in this manuscript which overcomes the design constraints of nano scale CMOS circuits. This manuscript presents the analysis of 2:4 decoder circuit using four different methodologies. QCA based decoder circuit is implemented using coupled majority voter minority gate, 45 0 rotated cells, multilayer wire crossings and five input Majority Voter gate. Comparative study of these four decoder shows that performance of Coupled majority voter minority gate based 2:4 decoders is good in terms of complexity, latency, and area. The QCA Designer 2.0.3 device is utilized for the implementation of QCA based Decoder circuits.