The missing term in the following series is:

N5V, K7T, ?, E14P, B19N

Looking at the series: N5V, K7T, ?, E14P, B19N

Let me analyze each component separately.

For the first letters: N, K, ?, E, B

Position in alphabet:

• N = 14th letter
• K = 11th letter
• E = 5th letter
• B = 2nd letter

The pattern shows: 14, 11, ?, 5, 2

The difference is -3 each time.

$14 - 3 = 11$

$11 - 3 = 8$

$8 - 3 = 5$

$5 - 3 = 2$

The 8th letter of the alphabet is H.

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For the numbers: 5, 7, ?, 14, 19

Looking at the differences between consecutive terms:

$7 - 5 = 2$

The differences form a pattern: 2, 3, 4, 5...

$7 + 3 = 10$

$10 + 4 = 14$

$14 + 5 = 19$

The missing number is 10.

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For the last letters: V, T, ?, P, N

Position in alphabet:

• V = 22nd letter
• T = 20th letter
• P = 16th letter
• N = 14th letter

The pattern shows: 22, 20, ?, 16, 14

The difference is -2 each time.

$22 - 2 = 20$

$20 - 2 = 18$

$18 - 2 = 16$

$16 - 2 = 14$

The 18th letter of the alphabet is R.

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The missing term is H10R.

Therefore, the answer is Option 3.