In the figure of budding in yeast given here, the structures A, B, C and D should be labelled respectively as :
(1) nucleus of bud, bud, yeast, nucleus
(2) dividing nucleus of bud, bud, yeast, nucleus
(3) nucleus of bud, bud, yeast, dividing nucleus of yeast
(4) dividing nucleus of yeast, yeast, bud, nucleus of bud