Assertion : Test cross is a type of back cross

Reason : In test cross the F₁-hybrid is crossed back with the homozygous recessive parent

Both (A) and (R) are true and (R) is the correct explanation of (A)

Assertion is true. The term "back cross" refers to crossing an individual with its parent or an individual with the parent's phenotype

Reason is also true. The test cross involves crossing the F₁ hybrid (unknown genotype) with one of its parents having the homozygous recessive phenotype, which is a form of back cross.