Movement into and out of cells — practice question

The diagram shows two solutions, P and Q, which were divided by a partially permeable dialysis tubing. What is the initial movement of molecules 1, 2 and 3 between solution P and solution Q?

• ANet movement from Q to P: molecule 1; net movement from P to Q: molecule 2; no net movement: molecule 3
• BNet movement from Q to P: molecule 1; net movement from P to Q: molecule 3; no net movement: molecule 2
• CNet movement from Q to P: molecule 2; net movement from P to Q: molecule 3; no net movement: molecule 1
• DNet movement from Q to P: molecule 3; net movement from P to Q: molecule 1; no net movement: molecule 2