In hybrid maize varieties,which of the following elements have been found to have double the amount compared to existing maize varieties?
$(i)$ Lysine
$(ii)$ Alanine
$(iii)$ Tryptophan
$(iv)$ Proline
$(v)$ Histamine

• A
  $(i)$ and $(v)$
• B
  $(i)$ and $(iii)$
• C
  $(ii)$ and $(iv)$
• D
  $(iv)$ and $(v)$