How does the DNA content of genomic libraries differ from cDNA libraries?

• A. Genomic libraries contain introns, while cDNA libraries contain non-coding sequences.
• B. Genomic libraries contain all DNA sequences, while cDNA libraries contain only coding sequences.
• C. Genomic libraries contain only coding sequences, while cDNA libraries contain all DNA sequences.
• D. Genomic libraries contain mRNA sequences, while cDNA libraries contain genomic DNA.

Answer: (B)