Pink (NN) flowered plants crossed with blue (nn) flowered plants gave black (Nn) flowered plants in F1 generation. If F1 plants dre selfed, which of the following will be the phenotype of F2 progeny?

A) All blue B) 1/2 blue and 1/2 pink C) All pink D) 1/4 pink, 1/2 black, 1/4 blue