In Antirrhinum two plants with pink flowers were hybridised. The F1 plants produced red, pink and white flowers in the proportion of 1 red, 2 pink and 1 white. What would be the genotype of the two plants used for hybridisation? Red flower colour is determined by RR and white by rr genes________.

A. rr

B. Rr

C. Rrr

D. RR