For a reversible reaction $A \rightleftharpoons B$, Which one of the following statement is wrong from the given energy profile diagram ?

Question

(1) Activation energy of forward reaction is greater than backward reaction.

(2) The forward reaction is endothermic

(3) The threshold energy is less than that of activation energy.

(4) The energy of activation of forward reaction is equal to the sum of heat of reaction and the energy of activation of backward reaction.