The diagram shows the enthalpy changes for a series of reactions. R $\rightarrow$ S with $\Delta H = -134\ \text{kJ mol}^{-1}$ S $\rightarrow$ U with $\Delta H = +92\ \text{kJ mol}^{-1}$ R $\rightarrow$ T with $\Delta H = -75\ \text{kJ mol}^{-1}$ T $\rightarrow$ U Which of the following statements are correct?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct