Final answer:
The recombination frequency that indicates perfect linkage and violates Mendel's law of independent assortment is 0%, as it shows genes are inherited together without any recombination.
Step-by-step explanation:
The recombination frequency that corresponds to perfect linkage and violates the law of independent assortment is 0%. This is because a 0% recombination frequency indicates that there is no crossing over between the genes; thus, the genes are always inherited together as a block. This perfect linkage means the alleles do not assort independently of each other, which is contrary to Mendel's law of independent assortment that applies when genes are on different chromosomes or are very far apart on the same chromosome. Therefore, the correct answer is a) 0%.