Assertion: Gene recombination refers to the exchange of blocks of genetic material among two or more DNA strands. Reason: In site-specific recombination, specialized nucleotide sequences exhibiting some degree of target site specificity are moved between homologous sites within a genome.

Directions: In the following question, there are two statements, Assertion (A) and Reason (R). Consider both the statements independently and mark your answer as follows:

1. A and R both are correct and R is the correct explanation of A.
2. A and R both are correct and R is not the correct explanation of A.
3. A is correct and R is incorrect.
4. A is incorrect and R is correct.
5. A and R both are incorrect.