challenge: What is the primary pathway followed by RAB2B in eukaryotic cells?
  
  A. Mitochondrial pathway from cytosol to nucleus
  B. Endocytic pathway from Golgi complex to endoplasmic reticulum
  C. Lysosomal pathway from Golgi complex to plasma membrane
  D. Exocytic pathway from endoplasmic reticulum to Golgi complex
  Answer: 