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Which one is not a possible progeny in the F2 generation of purebred tall plants with round seeds and a short plant with wrinkled seeds?

Gregor Mendel's law of segregation states that during the formation of gametes, the two copies of a gene (alleles) separate, and only one allele is passed on to each offspring. This results in a random distribution of alleles in the offspring.

The 9:3:3:1 ratio is the outcome of a cross between two heterozygous individuals (F1 generation), each having one dominant allele and one recessive allele for a particular trait. In the F2 generation, the offspring have a 9:3:3:1 ratio of phenotypes, where 9 out of every 16 offspring exhibit the dominant phenotype, 3 exhibits a different phenotype (resulting from the expression of the recessive allele), 3 exhibits the dominant phenotype and a different phenotype (as a result of heterozygosity), and 1 exhibits the recessive phenotype.

Four different phenotypes in the ratio 9:3:3:1 will make up the F2 generation of offspring. They are, in order, 9 tall plants with round seeds, 3 tall plants with wrinkled seeds, 3 short plants with round seeds, and 1 short plant with wrinkled seeds. A tall plant with wrinkled & round seeds is not possible.