Which of the following statements are not incorrect

I) Liver, the largest gland in our body secretes cholesterol, degrade steroid hormones, vitamins and drugs

 II) Sebaceous glands eliminate certain substances like urea, sterols and sebum

 III) Sweat produced by sweat glands is a oily fluid containing NaCl

 IV) In uremic patients urea and glucose can be removed by a process called hemodialysis