Which of the following reactions are disproportionation reaction?

(1) $2C{u}^{+}\to C{u}^{2+}+C{u}^0$                      

(2) $3Mn{O}_4^{2-}+4H^{+}\to 2Mn{O}_4^{-}+Mn{O}_2+2H_{2}O$                         

(3) $2KMn{O}_4\stackrel{\Delta }{\to }{K}_{2}Mn{O}_4+Mn{O}_2+O_2$              

(4)  $2Mn{O}_4^{-}+3M{n}^{2+}2H_{2}O\to 5Mn{O}_2+4H^{\oplus }$

Select the correct option from the following