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If A + B = 2C and C + D = 2A, then

A + C = B + D
A + C = 2D
A + D = B + C
A + C = 2B

Correct Answer: A + C = B + D

Explanation:

Given,

A + B = 2C ----(i)

C + D = 2A----(ii)

Adding (i) and (ii) we get : A + B + C + D = 2C + 2A

=> B + D = A + C

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