In the following question, select the related word pair from the given alternatives. Current : Ampere : : ? : ?

Introduction / Context:
This is an analogy question involving basic physics terminology. The relationship given is Current : Ampere, where the second word is the unit in which the first physical quantity is measured. The examinee must identify another pair of words that exhibits the same relationship. Such questions test both general science knowledge and the ability to spot patterns in word pairs.

Given Data / Assumptions:

• The model pair is Current : Ampere.
• Current is an electrical quantity.
• Ampere is the SI unit used to measure electric current.
• We must find a pair where the second term is the correct unit of the first term.
• Options given involve air, kilogram, pressure, speed, work, joule, temperature, and metre.

Concept / Approach:
The relationship is quantity to unit. We first confirm that current is indeed measured in amperes. Next, we search for a physical quantity whose internationally recognised unit appears in the options. Work is a form of energy transfer, and its SI unit is joule. Air is not a measurable physical quantity in the same sense, and neither pressure nor temperature is measured in the remaining second words speed or metre. Thus, Work : Joule mirrors the relationship Current : Ampere.

Step-by-Step Solution:
Step 1: Identify the pattern in the given pair: the second word names the unit of the first word. Step 2: Confirm basic science facts. Electric current is measured in amperes. Step 3: Examine each option and ask whether the second word is the standard unit of the first word. Step 4: Air : Kilogram fails because we do not measure air as a quantity called air; mass is measured in kilograms. Step 5: Pressure : Speed is incorrect because pressure is measured in pascal or similar units, not in speed. Step 6: Work : Joule is correct because work is measured in joules in the SI system. Step 7: Temperature : Metre is incorrect because temperature is measured in degree Celsius or kelvin, not in metre, which is a unit of length.

Verification / Alternative check:
Check the accepted SI units: current in ampere, length in metre, mass in kilogram, time in second, temperature in kelvin, work or energy in joule, and pressure in pascal. Among the options, only work paired with joule matches a true quantity unit relationship. Therefore, this option safely parallels the pattern of the given pair. No other option offers a correct match of quantity and unit, confirming our choice.

Why Other Options Are Wrong:
Air : Kilogram: Kilogram is a mass unit. While we can measure the mass of air in kilograms, air itself is not a fundamental quantity whose defined unit is kilogram. Pressure : Speed: These are two different physical quantities. Speed is not a unit of pressure; it is itself measured in metres per second. Temperature : Metre: Metre is the unit of length, not temperature. Temperature has its own units such as kelvin and degree Celsius.

Common Pitfalls:
Some students choose an option just because both words are from science, without checking the exact relationship. The key is to verify whether the second word is truly the name of the unit in which the first quantity is measured. Memorising a small set of fundamental SI units greatly helps in tackling such analogy questions in exams.

Final Answer:
The correct related pair is Work : Joule, because work is measured in joules, just as current is measured in amperes.