Which of the following graphs shows correct variation of efficiency of a Parson s reaction turbine with respect to blade speed ratio?

• A. <img alt="Variation of efficiency of Parsons reaction turbine w.r.t blade speed ratio - option a" class="alignnone size-full wp-image-286430" height="205" sizes="(max-width: 308px) 100vw, 308px" src="https://www.sanfoundry.com/wp-content/uploads/2020/08/thermal-engineering-multiple-choice-questions-answers-q1a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/08/thermal-engineering-multiple-choice-questions-answers-q1a.png 308w, https://www.sanfoundry.com/wp-content/uploads/2020/08/thermal-engineering-multiple-choice-questions-answers-q1a-300x200.png 300w" width="308"/>
• B. <img alt="Variation of efficiency of Parsons reaction turbine w.r.t blade speed ratio - option b" class="alignnone size-full wp-image-286429" height="241" src="https://www.sanfoundry.com/wp-content/uploads/2020/08/thermal-engineering-multiple-choice-questions-answers-q1b.png" width="288"/>
• C. <img alt="Variation of efficiency of Parsons reaction turbine w.r.t blade speed ratio - option c" class="alignnone size-full wp-image-286428" height="200" src="https://www.sanfoundry.com/wp-content/uploads/2020/08/thermal-engineering-multiple-choice-questions-answers-q1c.png" width="256"/>
• D. <img alt="Variation of efficiency of Parsons reaction turbine w.r.t blade speed ratio - option d" class="alignnone size-full wp-image-286427" height="203" src="https://www.sanfoundry.com/wp-content/uploads/2020/08/thermal-engineering-multiple-choice-questions-answers-q1d.png" width="235"/>