Choose the word which has different stress from the others

Choose the word which has different stress from the others.
46. A. historic B. national C. unusual D. cathedral
46. A. district B. control C. global D. cover
47. A. population B. information C. metropolitan D. gallery
48. A. sickness B. cancer C. purpose D. conserve
49. A. forester B. policy C. erosion D. vegetable
50. A. finance B. temperate C. poisoning D. abandon