Step 1: Production Function Identification. - Translog Production Function (A): Defined by \( q = \prod_{i=1}^{n} x_i^{a_i} \). Corresponds to (I). - Generalised Leontief Production Function (B): Characterized by \( q = \sum_{i=1}^{n} a_i x_i^{\rho} \), with \( \rho \leq 1 \). Corresponds to (II). - Cobb Douglas Production Function (C): Formulated as \( q = \sum_{i=1}^{n} a_{ij} x_i x_j \), where \( a_{ij} = a_{ji} \). Corresponds to (III). - Constant Elasticity of Substitution Production Function (D): Expressed as \( q = a_0 + \sum_{i=1}^{n} a_i \ln x_i + 0.5 \sum_{i=1}^n \ln x_i \). Corresponds to (IV).
Step 2: Conclusion. The correct mapping is (A) - (I), (B) - (II), (C) - (III), (D) - (IV).