. Back cross is a cross between
A: F1 × F1
B: F1 × Recessive
C: F1 × Dominant
D: F1 × any parent
Backcrossing is referred to as a crossing of the F1 hybrid with any of the two parents
to produce offspring which are somewhat genetically identical to the parent.
Hence, option D. i.e., F1 × any parent is the correct answer.