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.    (i), (ii) and (iv)
C.    (i) and (ii)
D.    only (i)

Ans: A