To solve this problem, we need to understand the inheritance pattern of flower color in Snapdragon plants.$\newline$Snapdragon plants exhibit incomplete dominance in flower color inheritance.$\newline \bullet$In incomplete dominance, the heterozygous phenotype is a blend of the two homozygous phenotypes.$\newline \bullet$For Snapdragon plants:$\newline$ - The genotype for red flowers is RR.$\newline$ - The genotype for white flowers is WW.$\newline$ - The heterozygous genotype RW results in pink flowers.$\newline$Given: A pink flowered Snapdragon plant (RW) is crossed with a red flowered Snapdragon plant (RR).$\newline$Let's determine the possible genotypes and phenotypes of the progeny:$\newline \bullet$The possible gametes from the pink flowered plant (RW) are R and W.$\newline \bullet$The possible gametes from the red flowered plant (RR) are R.$\newline$Using a Punnett square, we can determine the progeny:$\newline \bullet$Crossing RW (pink) with RR (red):$\newline$ - Gametes: R, W from RW and R from RR.$\newline$ - Possible combinations:$\newline$ - R from RW with R from RR gives RR (red flowers).$\newline$ - W from RW with R from RR gives RW (pink flowers).$\newline$Therefore, the expected phenotypes in the progeny are red flowered and pink flowered plants.$\newline$This corresponds to Option 4: Red flowered as well as pink flowered plants.