The correct option is C greater than 50 Jmol−1K−1
We know,
△G=△H−T△S
for a reaction to be feasible it should be sponteneous, that is when,
△G=−ve
and for that T△S should be greater in magnitutde than △H i.e.
⇒T△S>△HT=27+273=300 K⇒300△S>15000 Jmol−1⇒△S>50 Jmol−1K−1