In which of the following case, the forms of amino acid and pH is (are) correctly matched ?
A. `{:("Alanine : pH=3 , "H_(3) overset(+)(N)-C-COO^(-)),(" |"),(" "CH_(3)):}`
B. `{:("Leucine : pH=10 , "H_(2)N-"C H"-COO^(-)),(" |"),(" "CH_(2)-"C H"-CH_(3)),(" |"),(" "CH_(3)):}`
C. `{:("Asparic acid : pH=9 , "H_(2)N-"C H"-COO^(-)),(" |"),(" "CH_(2)-COO^(-)):}`
D. `{:("Lysine : pH=3 , "H_(3)overset(+)(N)-CH-COOH),(" |"),(" "CH_(2)CH_(2)CH_(2)CH_(2) overset(+)(N)H_(3)):}`
