To solve this problem, we need to match the items in List I with the appropriate descriptions in List II. Let's analyze each item:$\newline \bullet$A. Two or more alternative forms of a gene:$\newline$ - These are known as alleles. Alleles are different versions of a gene that may produce distinguishable phenotypic effects.$\newline$ - This matches with III.$\newline \bullet$B. Cross of F1 progeny with homozygous recessive parent:$\newline$ - This is known as a test cross. A test cross is used to determine the genotype of an individual with a dominant phenotype.$\newline$ - This matches with IV.$\newline \bullet$C. Cross of F1 progeny with any of the parents:$\newline$ - This is known as a back cross. A back cross involves crossing the F1 hybrid with one of its parents.$\newline$ - This matches with I.$\newline \bullet$D. Number of chromosome sets in plant:$\newline$ - This is referred to as ploidy. Ploidy indicates the number of sets of chromosomes in a cell.$\newline$ - This matches with II.$\newline$Now, let's match the items from List I with List II:$\newline A \rightarrow III, B \rightarrow IV, C \rightarrow I, D \rightarrow II \newline$This corresponds to Option 1.