Mark the correct alternative in each of the following: \( A B C D \) is a parallelogram and \( E...

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Mark the correct alternative in each of the following:
\( A B C D \) is a parallelogram and \( E \) and \( F \) are the centroids of triangles \( A B D \) and \( B C D \)
W respectively, then \( E F= \)
(a) \( A E \)
(b) \( B E \)
(c) \( C E \)
(d) \( D E \)
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