Do these two sentences from wikipedia have the same meaning?
An optical waveguide is a physical structure that guides electromagnetic waves in the optical spectrum . Common types of optical waveguides include optical fiber and rectangular waveguides .
An optical waveguide is a rectangular structure that guides electromagnetic waves in the physical spectrum . Ordinary types of optical waveguides include optical fibres and optical waveguides .

Available options: (I) no. (II) yes.
The answer is:
(I)