Directions: The following item consist of two statements one labeled as ‘Assertion A’ and the other labeled as ‘Reason R’. You are to examine these two statements carefully and decide if the Assertion A and the Reason R are individually true and if so whether the reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer sheet accordingly.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is NOT the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Assertion (A): When linearly elastic material is loaded biaxially the directions of principal stresses are different from those of principal strains.
Reason (R): For an isotropic linearly elastic material to Hooke’s law gives only two independent material properties.