Which of the following correctly represents the exit age distribution of a PFR?

• A. <img alt="Exit age distribution of a PFR - option a" class="alignnone size-full wp-image-284200" height="296" sizes="(max-width: 368px) 100vw, 368px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6a.png 368w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6a-300x241.png 300w" width="368"/>
• B. <img alt="Exit age distribution of a PFR - option b" class="alignnone size-full wp-image-284199" height="295" sizes="(max-width: 369px) 100vw, 369px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6b.png 369w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6b-300x240.png 300w" width="369"/>
• C. <img alt="Exit age distribution of a PFR - option c" class="alignnone size-full wp-image-284198" height="289" sizes="(max-width: 366px) 100vw, 366px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6c.png 366w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6c-300x237.png 300w" width="366"/>
• D. <img alt="Exit age distribution of a PFR - option d" class="alignnone size-full wp-image-284197" height="292" sizes="(max-width: 361px) 100vw, 361px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6d.png 361w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-non-ideal-flow-basics-properties-c-f-e-curves-1-q6d-300x243.png 300w" width="361"/>