The correct option is C test cross
The test cross is a cross between a recessive homozygous individual parent and an individual with unknown allelic composition. This cross basically helps to confirm if the unknown allelic composition is homozygous or heterozygous for the dominant allele.
Intercross is the cross fertilization between different kinds of animals, or different varieties of plants.
Top cross is a cross between a superior purebred male and inferior female to improve the average quality of the progeny.