Shear And Bulk Modulus

The bulk modulus of a spherical object is If it is subjected to uniform pressure the fractional decrease in radius is:

1.		2.
3.		4.

Given below are two statements:

Assertion (A):	The stretching of a spring is determined by the shear modulus of the material of the spring.
Reason (R):	A coil spring of copper has more tensile strength than a steel spring of the same dimensions.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is False but (R) is True.
4.	(A) is True but (R) is False.