Which of the following sets are correctly matched?

Metal		Refining process
I)	Hg	Distillation
II)	Cu	Poling
III)	B	Zone refining
IV)	Ti	Liquation

• A

  I,III & IV only
• Correct answer
  B

  I,II & III only
• C

  II,III & IV only
• D

  I,II,III & IV

Hence, the correct answer is option: 'B'.