How many chromosomes are present in each of the following with respect to Maize plant respectively.
(a) Leaf epidermal cell
(b) Antipodal cell
(c) Endosperm cell
(d) Generative cell
(e) Egg cell
(f) Megaspore
(g) Microspore mother cell.

The correct option is C $20,10,30,10,10,10,20$

Maize is a diploid somatic celled organism whose 2n = 20 chromosomes. So,

Somatic Cell (2n) = 20

Antipodal Cell (n) = 10

Triple fusion = 2 polar nuclei + 1 male gamete = PEN(3n) = 30

Generative Cell (n) = 10

Egg Cell (n) = 10

Megaspore (n) = 10

Microspore Mother Cell (2n) = 20

So, the correct option is B.