Arrange the following substances in increasing order of typical economic value (common marketplace perception): (b) Silver → (a) Gold → (c) Platinum → (d) Diamond Select the correct ascending sequence.

Introduction / Context:
Reasoning tests sometimes ask you to order items by common real-world valuation. While exact prices fluctuate by market and quality, a standard ascending perception is Silver < Gold < Platinum < Diamond (gem-grade).

Given Data / Assumptions:

• Silver is generally less expensive than gold per unit mass.
• Gold commonly exceeds silver in value.
• Platinum is typically priced at or above gold in many periods; for test convention, place it after gold.
• Diamond (gem-quality) is considered the top value per piece.

Concept / Approach:
Use broadly taught conventional ordering rather than day-to-day commodity spot prices; exams test general knowledge, not market anomalies.

Step-by-Step Solution:
Begin with (b) Silver.Then (a) Gold.Then (c) Platinum.Finally (d) Diamond.Thus: (b), (a), (c), (d).

Verification / Alternative check:
The sequence matches standard GK materials used in aptitude prep.

Why Other Options Are Wrong:
They either reverse the order or start with the most valuable item.

Common Pitfalls:
Over-fitting to short-term commodity price swings; stick to exam-conventional ordering.

Final Answer:
(b), (a), (c), (d)