In which of the following is incomplete dominance observed?

When a cross is made between red and white homozygous flowers of Snapdragon, what will be the flower color in the $F_1$ generation?

In Antirrhinum,two plants with pink flowers were hybridized. The $F_1$ plants produced red,pink,and white flowers in the proportion of $1$ red,$2$ pink,and $1$ white. What could be the genotype of the two plants used for hybridization? Red flower color is determined by $RR$,and white by $rr$ genes.

The presence of the $Bb$ gene in pea plants results in intermediate-sized starch grains. Which phenomenon does this represent?

In Mirabilis,a hybrid for red $(RR)$ and white $(rr)$ flower produces pink $(Rr)$ flower. $A$ plant with pink flower is crossed with a white flower,the expected phenotypic ratio is

In $Antirrhinum$ (Snapdragon),a cross between a white-flowered recessive plant $(ww)$ and a red-flowered dominant plant $(RR)$ results in $180$ plants in the $F_2$ generation. How many of these plants will have the same genotype as the parents?