Answer: B — (iii), (ii), (iv), (i), (v)
Correct sequence: finger-like extensions form → food vacuole forms → complex substances broken down → simple nutrients diffuse into cytoplasm → undigested material thrown out.
The passage clearly states the order: temporary finger-like extensions fuse over food → food vacuole forms → complex substances broken to simpler ones inside the vacuole → diffuse into cytoplasm → undigested material thrown out. Option B matches this exactly. Students often confuse steps (iv) and (i) — digestion (iv) must happen before diffusion (i) can occur.