Understanding the Relationship: Mass and Kilogram

The question asks us to find a pair of words that share the same relationship as the given pair: Mass : Kilogram.

Let's analyze the relationship between 'Mass' and 'Kilogram'. Mass is a physical quantity, and Kilogram (kg) is the standard SI unit used to measure mass. So, the relationship is Physical Quantity : SI Unit.

Analyzing the Options

Now, let's look at the given options and determine the relationship between the words in each pair:

• Option 1: Length : Meter
  Length is a physical quantity. Meter (m) is the standard SI unit used to measure length. The relationship is Physical Quantity : SI Unit. This matches the relationship in the given pair.
• Option 2: Distance : Scale
  Distance is a physical quantity. However, Scale is not a unit of distance. A scale is typically a ratio used in maps or models (e.g., 1:100). The standard SI unit for distance is Meter. This relationship does not match.
• Option 3: Electric Current : Mole
  Electric Current is a physical quantity. Mole (mol) is the standard SI unit for the amount of substance. The standard SI unit for Electric Current is Ampere (A). This relationship does not match.
• Option 4: Temperature : Candela
  Temperature is a physical quantity. Candela (cd) is the standard SI unit for luminous intensity. The standard SI unit for Temperature is Kelvin (K). This relationship does not match.

Conclusion

Comparing the relationships, only the pair 'Length : Meter' shares the same Physical Quantity : SI Unit relationship as 'Mass : Kilogram'.