<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:Which of the following factors gives the elastin molecule the ability to stretch and recoil?? A: Hydroxylation of proline and lysine rich regions, B: Cross-links between lysine residues, C: Elastase activity, D: Triple helix formation, E: Cleavage of disulfide rich terminal regions,  <response>: This question is asking about the property of elastin that allows it to stretch and recoil. Elastin is a protein found in connective tissue that gives tissues the ability to stretch and return back to their original shape. The key here is the ability to stretch and recoil. This indicates we need to consider which of the answer choices relates to the elastic properties of elastin.Choice A refers to hydroxylation, which is a post-translational modification that occurs in elastin but does not directly relate to its stretching ability. Choice B refers to cross-links between lysine residues. These cross-links are critical for providing the elastic recoil property of elastin. This is likely the correct answer.Choice C refers to elastase activity. Elastase is an enzyme that breaks down elastin, so this would not provide the elastic recoil property.Choice D refers to triple helix formation. This is a property of collagen, not elastin. Choice E refers to disulfide bonds, which again occur in elastin but do not directly provide the stretching and recoiling ability.B: Cross-links between lysine residues 