If E, N, K and 1/m are modulus of elasticity, modulus of rigidity. Bulk modulus and Poisson ratio of the material, the following relationship holds good

• A. <img src="/_files/images/civil-engineering/theory-of-structures/83-21-28-1.png">
• B. <img src="/_files/images/civil-engineering/theory-of-structures/83-21-28-2u.png">
• C. <img src="/_files/images/civil-engineering/theory-of-structures/83-21-28-3.png">
• D. all the above.