Mendel cross tall and dwarf plant. In $F_{2}$-generation the observed ratio was $3: 1$ (tall: short). From this result, he deduced

$I.$ law of dominance

$II.$ law of independent assortment

$III.$ law of segregation

$IV.$ incomplete dominance

Choose the correct option

  • A

    $I, II, III$ and $IV$

  • B

    $I$ and $III$

  • C

    $II, III$ and $IV$

  • D

    $I, II$ and $III$

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