Question

what is this piece of lab equipment?
graduated cylinder
ring stand
beaker
clay triangle

Explanation:

A graduated cylinder is a tall, narrow - cylindrical container with volume markings used to measure the volume of liquids accurately. The image shows a tall, cylindrical piece of equipment with markings, which is characteristic of a graduated cylinder. Ring stands are used to hold other equipment, beakers are wider and more open - mouthed for holding and mixing substances, and clay triangles are used for supporting crucibles during heating.

Answer:

A. graduated cylinder