Right answer is (c) εzx=0

Easy explanation: The strain field associated with the given stress field has the form ε=Sσ, where the matrix S is a symmetric matrix, and it is called elastic compliances matrix. In the XYZ Cartesian system, all the strain components except εyz and εzx are non-zero. Thus, εxx≠0, εyy≠0, εzz≠0, εxy≠0, where as εyz=0 and εzx=0.