Question

question
which vessel(s) collect(s) blood from smaller veins draining the myocardial capillaries and deliver(s) this blood to the coronary sinus?
answer
anterior cardiac vein
great cardiac vein and middle cardiac vein
middle cardiac vein
great cardiac vein
i dont know yet

Explanation:

The great cardiac vein and middle cardiac vein collect blood from smaller veins draining myocardial capillaries and deliver it to the coronary sinus. The anterior cardiac vein drains into the right atrium directly. The middle cardiac vein alone or the great cardiac vein alone does not cover the full collection and delivery as described in the question.

Answer:

Great cardiac vein and middle cardiac vein