Find the missing term: 4D7, 9G9, 16J11, ...?

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A 20N12
B 25M13
C 20M13
D 25N13

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Answer: B. 25M13

First numbers are squares: 2², 3², 4², so next is 5² = 25.
Letters: D, G, J increase by 3, so next is M.
Last numbers: 7, 9, 11 increase by 2, so next is 13.
Answer: 25M13.

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Find the missing term: 4D7, 9G9, 16J11, ...?

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