Where are the sweat glands and sebaceous glands located?

Which of the following pairs is correct?

In which of the following is harmful uric acid converted into potassium sulfocyanide?

Bilirubin,biliverdin,cholesterol,degraded steroid hormones,vitamins,and drugs are excreted by .......

Components present in sweat $- P$
Components present in sebum $- Q$
$I -$ Sterols,$II -$ Waxes,$III - NaCl$,$IV -$ Hydrocarbons,
$V -$ Lactic acid,$VI -$ Small amounts of urea
Select the correct option for $P$ and $Q$.
$P \quad Q$

Assertion : In vertebrates,the liver is also referred to as an accessory excretory organ.
Reason : Liver helps kidneys in the secretion of urine.