Consider the following activities in a building construction:1. Concreting of roof slabs2. Brick-jelly lime concrete terracing3. Erection of form work for slab4. Construction of parapet wall in terraceThe correct sequence of these activities is

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