Verbal - Odd Man Out

DIRECTIONS : In this oddman out section we need choose the word or pair that different from remaining words or pairs.
71. Pick the odd one out
  A.  Trunk
  B.  Leaf
  C.  Flower
  D.  Tree
72. Pick the odd one out
  A. Physics
  B. Chemistry
  C. Geography
  D. Botany

73. Pick the odd one out
  A.  Zinc
  B.  Aluminium
  C.  Copper
  D.  Mercury
74. Pick the odd one out
  A.  Sun
  B.  Moon
  C.  Universe
  D.  Star
75. Pick the odd one out
  A.  Violet
  B.  White
  C.  Yellow
  D.  Green