Which solution contains maximum number of ${H^ + }$ ion

  • A

    $0.1\, M$  $HCl$

  • B

    $0.1 \,M$  $N{H_4}Cl$

  • C

    $0.1\, M$  $NaHC{O_3}$

  • D

    $0.1 \,M$ $Na_2C{O_3}$

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