None of them are ";healthy" they are all delicious.
Well, if I talk about version then presently there are 12 versions of Android: Alpha(1.0) Beta(1.1 ) (C)upcake - (1.5) (D)onut - (1.6) (E)clairs - (2.0 - 2.1) (F)royo - (2.2 - 2.2.3) (G)ingerbread - (2.3 - 2.3.7) (H)oneyComb - (3.0 -3.2.6) (I)ce-Cream Sandwich - (4.0 -4.0.4) (J)ellybean - (4.1 -4.3.1) (K)itkat - (4.4) (L)ollipop - (5.0)