Expand the full and correct form of the common fuel acronym “LPG”. Choose the standard international expansion used in refining, distribution, and safety documentation.

Introduction / Context:
LPG is a widely used fuel comprising mainly propane and butane (and their mixtures). The correct standardized expansion is important in technical documentation, labeling, and regulations.

Given Data / Assumptions:

• Common variants appear in everyday usage.
• We must select the internationally accepted technical term.

Concept / Approach:
Standards and safety codes (transport, storage, MSDS) consistently use “Liquefied petroleum gas.” Note the spelling “Liquefied,” not “Liquified,” and “petroleum,” not “petrol.” The term reflects gas that has been liquefied by compression/cooling for storage and transport.

Step-by-Step Solution:

Verification / Alternative check:
Product datasheets and regulatory references consistently adopt “Liquefied petroleum gas (LPG).”

Why Other Options Are Wrong:

Common Pitfalls:
Confusing gasoline (“petrol”) with LPG constituents; propane/butane are distinct from gasoline fractions.

Final Answer:
Liquefied petroleum gas