Used to hold liquids; has narrow neck to prevent splashes

• A. Erlenmeyer Flask
• B. Graduated Cylinder
• C. Stem Cells
• D. Clinical Trials

Answer: (A)

This description points to a container designed to hold liquids while minimizing splashes, thanks to its shape. An Erlenmeyer flask has a conical body with a narrow neck, which reduces splashing when you swirl or mix contents. The wide base adds stability and makes heating or swirling safer, and the narrow neck allows you to stopper it if needed to limit evaporation. This combination is especially handy for tasks like mixing reagents, heating solutions, or slowly adding substances, where splash control matters. It’s different from a graduated cylinder, which is built for precise volume measurements and not optimized to prevent splashes during mixing. Stem cells and clinical trials aren’t containers, so they don’t fit this description.