If the Poissions ratio of a substance is 0.25 then the ratio of its Youngs modulus and rigidity modulus is

If the Poissions ratio of a substance is 0.25 then the ratio of its Yo

1.	If the Poissions ratio of a substance is 0.25 then the ratio of its Youngs modulus and rigidity modulus is
Answer» `2//5` `5//2` `4//5` `5//4` ANSWER :B