Find the missing term in the following letter series :
AYD, BVF, DRH, ?, KGLनिम्न वर्ण श्रेणी में लुप्त पद ज्ञात कीजिये :
AYD, BVF, DRH, ?, KGL

1. AFMJ
2. BGMJ
3. CGNJ
4. DFNK

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Correct answer: B. GMJ

Explanation

First letters: A(1), B(2), D(4), ?, K(11) — gaps +1, +2, +3, +4, so the missing one is 7 = G. Second letters: Y(25), V(22), R(18), ?, G(7) — gaps −3, −4, −5, −6, so it is 13 = M. Third letters advance by +2: D, F, H, J, L. The missing term is GMJ.प्रथम अक्षर: A(1), B(2), D(4), ?, K(11) — अन्तर +1, +2, +3, +4, अतः लुप्त अक्षर 7 = G। द्वितीय अक्षर: Y(25), V(22), R(18), ?, G(7) — अन्तर −3, −4, −5, −6, अतः 13 = M। तृतीय अक्षर +2 के क्रम में बढ़ते हैं: D, F, H, J, L। अतः लुप्त पद GMJ है।