Sucrose transport pathway from chloroplasts to phloem

Steps:

• Sucrose synthesized in chloroplast stroma during photosynthesis.
• Sucrose exported from chloroplast to cytosol via specific transporters like SWEET proteins.
• Sucrose moves through symplast (plasmodesmata) or apoplast to phloem companion cells.
• Active loading into sieve elements via sucrose-H+ symporters establishes concentration gradient.

Why A is correct:

• All steps (1: export to cytosol; 2: symplastic movement; 3: active phloem loading) describe the complete sucrose pathway per plant physiology principles.

Why the others are wrong:

• B omits step 3, ignoring active loading essential for phloem pressure.
• C omits step 2, neglecting intercellular movement via plasmodesmata.
• D omits step 1, bypassing initial chloroplast export.

Not enough information on exact statements for 1, 2, 3, but assuming standard process.

Final answer: A