The work of cytochrome is:

Correct option is C

✅ (c) Electron transfer: • Cytochromes are heme proteins that function in the electron transport chain (ETC) during aerobic respiration. • They transfer electrons between complex III and complex IV in mitochondria, facilitating ATP generation.
❌ (a) Oxidation of glucose: • Done by enzymes like hexokinase, not cytochromes directly.
❌ (b) Respiration: • Cytochrome is part of it, but the specific role is electron transport.
❌ (d) None of these: • Incorrect, as (c) is accurate.