What cross will produce the most pink flowered plants

Incomplete dominance will produce the most pink flowered plants.

Explanation:

Incomplete dominance means when an allele from two homozygous parents combine in the offspring. This offspring contains one allele from one parent and another allele from another parent.

Incomplete dominance doesn't allow just one allele or trait to dominate rather produces a combination of both. The Red flower has RR allele and the white flower has WW allele.

When two flowers are crossed there is probability of RR, WW or RW allele to be formed. The RW heterozygous allele forms the pink flower. The two alleles are expressed as Red and White.