A simply supported beam of span L carries a concentrated load W at its mid-span. The maximum bending moment M is

• A. <img src="/_files/images/civil-engineering/strength-of-materials/126-6.44-1.png">
• B. <img src="/_files/images/civil-engineering/strength-of-materials/126-6.44-2.png">
• C. <img src="/_files/images/civil-engineering/strength-of-materials/126-6.44-3.png">
• D. <img src="/_files/images/civil-engineering/strength-of-materials/126-6.44-4.png">
• E. <img src="/_files/images/civil-engineering/strength-of-materials/126-6.44-5.png">