The relationship between the linear elastic properties Young’s modulus (E), rigidity modulus (G) and Bulk modulus (K) is given by

A

$$\frac{9}{E} = \frac{3}{K} + \frac{1}{G}$$

B

$$\frac{1}{E} = \frac{9}{K} + \frac{3}{G}$$

C

$$\frac{3}{E} = \frac{9}{K} + \frac{1}{G}$$

D

$$\frac{9}{E} = \frac{1}{K} + \frac{3}{G}$$