Which could be a finding in reversible cell injury ?
Though formation of large, flocculent mitochondrial densities is a feature of irreversible cell injury. Small amorphous mitochondrial densities begin to appear in reversible cell injury. 
Option a,b,c are definitely features of irreversible cell injury
Pyknosis
Karyorrhexis
Karyolysis
Mitochondrial densities
Mitochondrial densities