You are at question (MCQ) number 1 and Test Number 1 of Sequence and Series: Arithmetic and Alphabet Series. To deal with Sequence and Series questions, you must take lesson on the subject. In case of science and Art subjects revise your text books and in case of general aptitude topics take lessons from the topic page.
The question: DEF, DEF2, DE2F2, _____, D2E2F3 .... with options: DEF3, D3EF3, D2E3F, D2E2F2 can be solved with the concepts and understanding of Sequence and Series.
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