Select the letter-cluster from among the given options that can replace the question mark (?) to complete the given series. BVTO, DTVM, ?, HPZI, JNBG

Correct — D. A four-letter cluster series is four independent series printed side by side. Split them.

Rule: the four positions step +2, −2, +2, −2.

Position 1: B, D, F, H, J
Position 2: V, T, R, P, N
Position 3: T, V, X, Z, B
Position 4: O, M, K, I, G

Read the missing column downwards: FRXK → option (d).

Why the others are wrong

• (a)
  RFXK — RFXK has the first two letters swapped. Position 1 must continue B, D, …, H, so it has to be F; position 2 must continue V, T, …, P, so it has to be R.
• (b)
  RXFK — RXFK has only the last letter in place. R, X and F are the right letters in the wrong slots — the first three positions demand F, then R, then X.
• (c)
  FKXR — FKXR starts correctly with F, then exchanges K and R. K belongs in position 4 (O, M, K, I, G) and R in position 2 (V, T, R, P, N).

Write the alphabet position under each slot and read the step off each column. Here the steps are +2, −2, +2, −2.

Because the blank sits third of five, you can derive it forwards from DTVM or backwards from HPZI — doing both gives you a free check.

Note that position 3 runs T, V, X, Z, B, wrapping past Z and continuing from A. That is normal and not a break in the pattern.

Key facts

• Position 1: B, D, F, H, J — step +2.
• Position 2: V, T, R, P, N — step −2.
• Position 3: T, V, X, Z, B — step +2, wrapping past Z back to A.
• Position 4: O, M, K, I, G — step −2.

Common traps

• Finding the right four letters and then ordering them wrongly — every option is an anagram of the answer.
• Abandoning the +2 step in position 3 at the wrap from Z to B.
• Deriving only forwards from DTVM and never checking the result back against HPZI.

No directly related past PYQ was found.