Muller Breslau’s principle for obtaining influence lines is applicable to i) trusses ii) statically determinate beams and frames iii) statically indeterminate structures, the material of which is elastic and follows Hooke’s law iv) any statically indeterminate structure The correct answer is

• A. (i), (ii) and (iii)
• B. only (i)
• C. (i) and (ii)
• D. (i), (ii) and (iv)

Answer: (A)