Relation between critical angles of water and glass is

• A

  ${\mathrm{C}}_{\mathrm{W}}>\mathrm{Cg}$

• B

  ${\mathrm{C}}_{\mathrm{W}}<{\mathrm{C}}_{\mathrm{g}}$

• C

  ${\mathrm{C}}_{\mathrm{w}}={\mathrm{C}}_{\mathrm{g}}$

• D

  ${\mathrm{C}}_{\mathrm{W}}={\mathrm{C}}_{\mathrm{g}}=0$