Correct option : (3) W→2Y
Explanation:
We know that energy is released when the total binding energy of products is more than the reactants.
In option (3) we find that.
Binding energy of reactants = 120×7.5 = 900 MeV
Binding energy of products = 260×8.5 = 1020 MeV
Thus 1020 MeV > 900 MeV and this process would release energy.
In option 1
B.E of reactants = 60×7.5 = 450
B.E of products = 2 (30×50) = 300
Not possible Similar is the case for process (2) and (4).