The binding energies per nucleon for a deuteron and an \[\alpha -\]particle are x1 and x2 respectively. What will be the energy Q released in the reaction \[_{1}{{H}^{2}}{{+}_{1}}{{H}^{2}}{{\to }_{2}}H{{e}^{4}}+Q\] [CBSE PMT 1995]

• A.            \[4({{x}_{1}}+{{x}_{2}})\]
• B.            \[4({{x}_{2}}-{{x}_{1}})\]
• C.            \[2({{x}_{1}}+{{x}_{2}})\]
• D.            \[2({{x}_{2}}-{{x}_{1}})\]