A cantilever beam of length L and a cross section with shape factor f supports a concentrated load P as shown below The length LP of the plastic zone, when the maximum bending moment equals the plastic moment MP, given by

• A. <img src="/_files/images/civil-engineering/gate-exam-questions/913-281-2.png">
• B. <img src="/_files/images/civil-engineering/gate-exam-questions/913-281-3.png">
• C. <img src="/_files/images/civil-engineering/gate-exam-questions/913-281-4.png">
• D. <img src="/_files/images/civil-engineering/gate-exam-questions/913-281-5.png">