Match the List 1 (Shape of Tunnel) with List 2 (Characteristics):List-1 List-2 A. Circular section 1. Provides more working space B. Horseshoe section 2. Provides greatest cross-sectional area for least perimeter C. Egg shape 3. Vertical sides with flat floor D. Segmental cross-section 4. Provides least cross-section area at the bottom

• A. A – 2, B – 1, C – 4, D - 3
• B. A – 1, B – 2, C – 3, D - 4
• C. A – 3, B – 4, C – 1, D - 2
• D. A – 4, B – 3, C – 2, D - 1