Pure Bred Pea Plant A is crossed with pure bred pea plant B. It is found that the plants which look like A do not appear in F1 generation, which of the plants A and B are tall and dwarf?
(1) A are tall and B are also tall
(2) A are tall and B are dwarf
(3) A are dwarf and B are tall
(4) A re dwarf and B are also dwarf
