Which ion is essential for blood clotting?

  • A
    $Na^+$
  • B
    $Ca^{2+}$
  • C
    $Cl^-$
  • D
    $Fe^{2+}$

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Similar Questions

Match the columns:
Column-$I$ (Blood group) Column-$II$ (Antigen present)
$A$. $A$ $p$. $B$
$B$. $B$ $q$. $A$
$C$. $AB$ $r$. $A$ and $B$
$D$. $O$ $s$. $A, B$ and $O$
$t$. $NIL$

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