The best $HLA$(Human Leucocyte Antigen) match for transplants in order of preference is

• A

  Parent $>$ sibling $>$ twin $>$ unrelated donor

• B

  Sibling $>$ twin $>$ Parent $>$ unrelated donor

• C

  twin $>$ unrelated donor $>$ parent $>$ sibling

• D

  Twin $>$ sibling $>$ Parent $>$ unrelated donor