Which side is regarded as the dense flow region?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4a.png"><img alt="Region in the Zenz diagram is regarded as the slug flow region - option a" class="alignnone size-full wp-image-247437" height="267" sizes="(max-width: 313px) 100vw, 313px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4a.png 313w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4a-300x256.png 300w" width="313"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4b.png"><img alt="Region in the Zenz diagram is regarded as the slug flow region - option b" class="alignnone size-full wp-image-247438" height="264" sizes="(max-width: 308px) 100vw, 308px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4b.png 308w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4b-300x257.png 300w" width="308"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4c.png"><img alt="Region in the Zenz diagram is regarded as the slug flow region - option c" class="alignnone size-full wp-image-247439" height="264" sizes="(max-width: 314px) 100vw, 314px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4c.png 314w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4c-300x252.png 300w" width="314"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4d.png"><img alt="Region in the Zenz diagram is regarded as the slug flow region - option d" class="alignnone size-full wp-image-247440" height="255" sizes="(max-width: 314px) 100vw, 314px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4d.png 314w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4d-300x244.png 300w, https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-bed-temperature-profiles-q4d-100x80.png 100w" width="314"/></a>