Assertion : Number of chromosomes in one genome is equal to number of linkage groups.
Reason : Linkage groups give important information about the location of genes in the chromosomes.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false

If both assertion and reason are false

Solution

If both assertion and reason are true but reason is not the correct explanation of assertion.

Linkage group, in genetics, all of the genes on a single chromosome. They are inherited as a group; that is, during cell division they act and move as a unit rather independently. The existance of linkage groups is the reason some traits do not comply with Mendel's law of independent assortment; ie, the principle applies only if genes are located on different chromosomes.