Consider the following statements 1. Usable bandwidth of ridge wave guide is more than that of rectangular waveguide.2. For a given value of TM₁₀ cutoff frequency the cross section of ridge wave guide is lesser that that of rect angular waveguide.3. Ridge wave guide has higher conductor losser than a rectangular waveguide.4. Ridge guide has higher conductor losser than a rectangular waveguide. Which of the above statements are correct?

• A. 1 and 2 only
• B. 1, 2 and 3 only
• C. 2 and 3 only
• D. All