Choose the correct option in the context of chromosome number in sexual life cycle of apple.

For apple, 2n= 34
Megasporocyte (megaspore mother cell) is a diploid cell; 2n= 34
Microspore is a haploid cell; n= 17
PEN is a triploid cell; 3n= 51
Oosphere is a female gamete; n= 17
Cells in an embryo are diploid; 2n= 34
Cells of nucellus are diploid; 2n= 34
Cells of pollen tetrad are haploid; n= 17
Pollen grains are haploid; n=17
Meiospores are the spores produced on meiosis and therefore are haploid; n=17