Match the following (Column-$I$ with Column-$II$):

Column-$I$	Column-$II$
$a$. Allele	$i$. Two alleles of a gene are identical
$b$. Genotype	$ii$. An individual having two different alleles of a gene
$c$. Homozygous	$iii$. Genetic constitution of an organism
$d$. Heterozygous	$iv$. Alternative forms of a gene

• A
  $a-i, b-ii, c-iii, d-iv$
• B
  $a-iv, b-iii, c-i, d-ii$
• C
  $a-iii, b-iv, c-ii, d-i$
• D
  $a-iii, b-ii, c-iv, d-i$