Given that both Leucine and Lysine start with 'L', why is 'L' assigned to Leucine?

• A. Leucine was discovered before Lysine.
• B. Leucine is more commonly found in proteins than Lysine.
• C. Leucine is more hydrophobic than Lysine.
• D. Leucine has a simpler structure than Lysine.

Answer: (B)