Where should you take a used battery?

Answer: A — To a garage or local authority site

When disposing of a used battery, it is important to take it to a designated location where it can be properly handled and recycled. Option A, taking it to a garage or local authority site, is the correct choice because these locations have the facilities and knowledge to safely recycle and dispose of batteries. Option B, recycling with household plastics, may seem like a good idea, but it is important to properly separate and dispose of batteries due to their potential hazardous materials. Option C, leaving it beside household waste for collection, is not a safe option as it could potentially cause harm to waste collectors or end up in a landfill. Option D, burying it in the ground, is also not a safe option as it can still cause harm to the environment. That is why option A is the best choice for disposing of a used battery.