The correct answer is 'on'. 'On auction' means through the process of auction, where items are sold to the highest bidder. Example: 'The antique vase was put on auction and sold for a high price.' Other options: 'in auction' is less common and might be used in some contexts, but 'on' is standard; 'of auction' is incorrect; 'with auction' is not used. Prepositions often have fixed uses in specific phrases, so memorization helps.

Break down complex topics into smaller, manageable chunks for easier recall.

Zambia

• Dickson Tembo – 1 pts

• Mid-point of A Line
• Equation of a Straight Line
• Parallel and Perpendicular Lines
• Area of Rectilinear Figures
• Distance of A Straight Line