The proportion of plants that were dwarf and tall, respectively in F₂-generation of Mendel's inheritance of one was

• A

  $\frac{1}{4}\mathrm{th} \mathrm{and} \frac{3}{4}\mathrm{th}$

• B

  $\frac{3}{4}\mathrm{th} \mathrm{and} \frac{1}{4}\mathrm{th}$

• C

  $\frac{2}{3}\mathrm{th} \mathrm{and} \frac{1}{3}\mathrm{th}$

• D

  $\frac{1}{3}\mathrm{th} \mathrm{and} \frac{4}{3}\mathrm{th}$