Which of the following sets comprises liquids which are poor conductors of electricity?

Liquids conduct electricity when they contain free ions. Distilled water has no dissolved salts so it is a poor conductor; vegetable oil is non-polar and lacks ions; shampoo also generally conducts poorly. In option 1, tap water and honey contain some dissolved ions. In option 2, salt solution, lemon juice and vinegar all contain ions and conduct electricity. In option 4, vinegar and lemon juice are acids that ionize and conduct. Hence only option 3 contains all poor conductors.