The given reactions,

$\text{ I. }2{\mathrm{Mn}}_2{\mathrm{O}}_7⟶4{\mathrm{MnO}}_2+3{\mathrm{O}}_2$

$\text{ II. }{\mathrm{SnCl}}_2+2{\mathrm{FeCl}}_3⟶{\mathrm{SnCl}}_4+2{\mathrm{FeCl}}_2$

are the examples of

intermolecular redox reaction and intramolecular redox reactions, respectively

Both reactions (I) and (II) are intermolecular redox reactions 

Both reactions (I) and (II) are intramolecular redox reactions

intramolecular redox reaction and intermolecular redox reaction, respectively