The increasing order of $pKa$ of following amino acids in aqueous solution is $Gly, \,Asp,\, Lys,\, Arg$
  • A$Asp < Gly < Arg < Lys$
  • B$Gly < Asp < Arg < Lys$
  • C$Asp < Gly < Lys < Arg$
  • D$Arg < Lys < Gly < Asp$
JEE MAIN 2019, Difficult
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