Following statement have been made about recombination in a diploid organism:

A. Recombination could not be identified by genotyping parents and offsprings for a pair of loci.

B. 50CM would be the maximum distance between two laci.

C. Recombination is not  a reciprocal process.

D. Occasionally non-homologous recombination happens and this functions as a source of chromosomal rearrangement.

Select the combination with all correct statements