The correct option is B back cross
The crossing of F1 individual with either of the two parents is known as a back cross.
In test cross, an organism with a dominant phenotype is crossed with the recessive individual. This cross is conducted to know whether the individual is heterozygous or homozygous dominant. Hence, crossing of F1 individual with the recessive parent is considered as a test cross.
A reciprocal cross includes a pair of crosses involving two types of individuals where the male of one type is crossed with a female of the second type and then vice versa.
Crossing of two organisms that differ in two characters is called a dihybrid cross.