153Civil EngineeringMediumMuller Breslau’s principle for obtaining influence lines is applicable to________?Aonly (i)B(i), (ii) and (iv)C(i) and (ii)D(i), (ii) and (iii) Correct answerD. (i), (ii) and (iii) ExplanationThe correct answer is (i), (ii) and (iii).