Gold Number is defined as the mass of protective colloidal solution which will just prevent the coagulation of x mL of a given gold solution on adding y mL of z % NaCl solution. x, y and z are respectively

• A

  x	y	z
  1	1	1

• B

  x	y	z
  10	1	10

• C

  x	y	z
  10	10	10

• D

  x	y	z
  1	1	10