An artist is planning to exhibit his paintings in an auditorium. Seven paintings - F, G, H, J, R, S and U are to be exhibited, three in the south hall and four in the north hall. Four of the paintings - F, G, H, J are oil paintings and three - R, S and U are acrylic paintings. The artist will satisfy the following requirements in setting up the exhibit: Each hall will exhibit at most two acrylic paintings. G cannot be exhibited in the same hall as U. H cannot be exhibited in the same hall as R. If S and R are placed in the south hall, which of the following must also be placed in the south hall?

Explanation: Total paintings: 7 (4 Oil: F, G, H, J; 3 Acrylic: R, S, U). South Hall: 3 paintings, max 2 Acrylic. North Hall: 4 paintings, max 2 Acrylic. Given: S (Acrylic) and R (Acrylic) are in South Hall (2 Acrylics, 1 Oil needed). Since South Hall has reached its max 2 Acrylics, the remaining Acrylic (U) **must** be in the North Hall. Rule: G cannot be with U. Since U is in North Hall, G **must** be in South Hall. Rule: H cannot be with R. Since R is in South Hall, H **must** be in North Hall. South Hall must contain: S, R, G. The remaining slot (1 Oil) is F or J. North Hall must contain: U, H, (F or J), (F or J or neither if one is in South). Since the question asks what **must** be in the South Hall, the answer is G.