In Pisum sativum, yellow seeds are dominant over green seeds. Round seeds are dominant over wrinkled seeds. If a true breeding Round green seeded plant is crossed with wrinkled and yellow seeded true-breeding plant, the phenotype of ${\mathrm{F}}_1$ hybrids is 

• A

  Round and green seeds

• B

  Wrinkled and green seeds 

• C

  Wrinkled and yellow seeds 

• D

  Round and yellow seeds