Concept:For any pyramid, the number of faces and edges is determined by the number of sides of its base. A triangular pyramid has a triangle as its base.Explanation:The base of a triangular pyramid is a triangle with 3 sides.Total faces = 1 base + 3 lateral triangular faces = 4 faces.Total edges = 3 base edges + 3 slant edges (from the apex to each base vertex) = 6 edges.This matches the property of a tetrahedron, which is another name for a triangular pyramid.Answer:4 faces and 6 edges (Option B).