If diamond is called gold, gold is called steel, steel is called ruby and ruby is called emerald, which is the cheapest jewel?

Correct option is D

Step 1: Analyze the renaming pattern

1. Diamond is called Gold.
2. Gold is called Steel.
3. Steel is called Ruby.
4. Ruby is called Emerald.

Step 2: Identify the cheapest jewel in reality

• In real life, Steel is the cheapest material among Diamond, Gold, Steel, Ruby, and Emerald.

Step 3: What is Steel called in the renaming scheme?

• Steel is renamed as Ruby.