The equivalent length of a column of length L, having both the ends hinged, is

• A. 2
• B. <i>L</i>
• C. <i>L</i>
• D. <img src="/_files/images/civil-engineering/theory-of-structures/94-21-151-1.png">
• E. <img src="/_files/images/civil-engineering/theory-of-structures/94-21-151-2.png">