Multiple choice

Dialyzer is a /an ______.

  1. metre used for controlling volume of sound

  2. apparatus used for recharging batteries

  3. special clock which indicates the day and date

  4. apparatus used in patients with defective renal functions

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A dialyzer is a medical device that performs the function of kidneys in patients with renal failure by removing waste products and excess fluids from blood through dialysis. It's not related to sound control, battery charging, or timekeeping.