For a reaction that is exothermic an non-spontaneous at `25^(@)C`, which quantity must be positive?

A reaction is non-spontaneous when:

In general, for exothermic reactions to be spontaneous

The following reaction is non-spontaneous

A: All reactions which are exothermic are spontaneous R: All reactions in which entropy increases are spontaneous

A: All reactions which are exothermic are spontaneous R: All reactions in which entropy increases are spontaneous

Do all exothermic reactions occur spontaneously?