7

Santa has an empty sleigh. First, he picks up 4 packages in the yellow house, then he picks up 3 packages in the blue house. When he gets to the pink house, he gives away 2 packages. Then he travels on to the green house and picks up 4 packages. Finally, he delivers 5 packages in the red house. How many packages are left in Santa's sleigh?

Answer options:

B: 7

C: 4

N: 9

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