False statement regarding second law of thermodynamics is

Options

A. It is impossible to construct a machine working in cycles which transforms heat from a lower temperature region to higher temperature region without intervention of any external agency
B. Heat cannot flow from a colder body to a hotter body on its own
C. For any spontaneous process taking place in an isolated system `Delta S lt O`
D. All spontaneous processes are thermodynamically irreversible & entropy of the system increases in all spontaneous processes

Answer

C

Explanation

For spontaneous process, `Delta S_("universe") gt 0`