What Is the Constraint for Node 2 in the Following

question 17

Multiple Choice

What is the constraint for node 2 in the following shortest path problem?

• A)-X₁₂-X₁₃ = 0
• B)-X₁₂-X₂₄ = 1
• C)X₁₂ + X₁₃ = 0
• D)-X₁₂ + X₂₄ = 0

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Definitions:

1,2-Ethanediol

A chemical compound commonly known as ethylene glycol, used as an antifreeze and precursor to polymers.

Propanoic Acid

A colorless, oily liquid with a pungent odor, used in the manufacture of various chemicals, including as a preservative.

Osmosis

The movement of water molecules through a semi-permeable membrane from a region of low solute concentration to a region of high solute concentration to equalize the concentrations on both sides of the membrane.

Semipermeable Membrane

A type of membrane that allows certain molecules or ions to pass through it by diffusion and occasionally specialized "facilitated diffusion," while blocking others.