<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A laboratory technician processes basic metabolic panels for two patients. Patient A is 18 years old and patient B is 83 years old. Neither patient takes any medications regularly. Serum laboratory studies show:Patient A Patient BNa mEqL 145 141K mEqL 3.9 4.4Cl- mEqL 103 109HCO3- mEqL 22 21BUN mgdL 18 12Cr mgdL 0.8 1.2Glucose mgdL 105 98Which of the following most likely accounts for the difference in creatinine seen between these two patients?? A: Insulin resistance, B: Normal aging, C: High serum aldosterone levels, D: Volume depletion, E: Low body mass index,  <response>: This is a question comparing the basic metabolic panel results between two patients of different ages. The key difference is the creatinine level, which is higher in the older patient. Creatinine is a byproduct of muscle metabolism and is filtered by the kidneys. Higher creatinine typically indicates impaired kidney function. However, creatinine also normally increases with age due to loss of muscle mass. Therefore, the most likely explanation for the higher creatinine in the older patient is normal aging. The other answer choices do not explain the creatinine difference and are not supported by the information provided.B: Normal aging 