Find the missing term in the given pattern: H38, K33, N28, ?, T 18

P23

P21

Q23

None of these

Letters: H, K, N, ?, T

The letters follow a pattern of increasing by 3 positions in the alphabet:

H (+3) → K (+3) → N (+3) → Q (+3) → T

Numbers: 38, 33, 28, ?, 18

The numbers decrease by 5:

38 - 5 = 33, 33 - 5 = 28, 28 - 5 = 23, 23 - 5 = 18

Therefore, the missing term is Q23.