The symbol substitutions are: + represents × × represents + – represents / > represents = = represents > (The second rule "+ represents difference" is ignored as conflicting with the first rule for '+')Let's evaluate each relation: A) 12-2+3+8×1>12 Substitute: 12/2 × 3 × 8 + 1 = 12 Calculate: (12/2) × 3 × 8 + 1 = 6 × 3 × 8 + 1 = 18 × 8 + 1 = 144 + 1 = 145. So, 145 = 12. False.B) 11×2+4-2+1=11 Substitute: 11+2 × 4 / 2 × 1 > 11 Calculate: (11+2) × (4/2) × 1 > 11 = 13 × 2 × 1 > 11 = 26 × 1 > 11 = 26 > 11. True.C) 7+2×5-5+2=7 Substitute: 7×2 + 5 / 5 × 2 > 7 Calculate: (7×2) + (5/5) × 2 > 7 = 14 + 1 × 2 > 7 = 14 + 2 > 7 = 16 > 7. True.D) 5×6-3+3+1>4 Substitute: 5+6 / 3 × 3 × 1 = 4 Calculate: 5 + (6/3) × 3 × 1 = 5 + 2 × 3 × 1 = 5 + 6 × 1 = 5 + 6 = 11. So, 11 =