biology mc

please answer these questions with explaination.
1.Which of the followering are excretory wastes produced by the liver?
(1.)uresa
(2.)bile salt
(3.)carbon dioxide
A.(1.)and(2.)only
B.(1).and(3.)only
C.(1.),(2.)and(3.3)

2.In a healthy person, which of the followering substances can be found in the blood of the renal vein?
(1.)urea
(2.)glucose
(3.)mineral salts
A.(1)and(2)only
B.(1)and (3)only
C.(2)and(3)only
D.(1),(2)and (3)