Amongst the following, the form of water with the lowest ionic conductance at 298 K is:

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Strategy:
 The ionic conductance of water depends primarily on the concentration of dissolved ions (impurities). Lower the solute concentration, lower the conductance.

Comparison:
1. Sea water: Contains the highest concentration of ions (~3.5% salts).
2. Saline water: Contains 0.9% .
3. Well water: Contains various minerals (calcium, magnesium, etc.).
4. Distilled water: Purified by evaporation and condensation; essentially free of mineral ions.

Since distilled water is the most pure among the

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