Let us pick the statement 1 AD= 20, but it does not tell us anything about AB or CD.
Let us pick statement 2, AB = CD in this case all it tells is the segment are equal but that does give anything about BC. we can have a case where AB=CD= 3 and BC = 4
Even if we combine them we cannot conclude that BC < CD because we can have the following case
AB=CD =5 & BC = 10 or AB=CD=8 & BC=4