Match each pair of equivalent fractions.

1. - 4a/8ab

2. - 9b^3/-3a^2b

3. 3a^4/1a^3 b^2

4. 5a^4b/-10a^2

A. 3a/b^2

B. - 1a^2b/2

C. 3b^2/1a^2

D. - 1/2b

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