What will be written in the place of question mark in the given series?
C3J10S19D4?16

Correct option is B

Separate letters and numbers.
Numbers:
3, 10, 19, 4, 16
Pattern:
3 → 10 (+7)
10 → 19 (+9)
19 → 4 (+11, cyclic since 19+11=30 → 30−26=4 if mapped alphabetically)
But looking normally at numbers:
3 + 7 = 10
10 + 9 = 19
19 − 15 = 4
4 + 12 = 16
This is not consistent.
Now check alphabet positions:
C = 3
J = 10
S = 19
D = 4
So numbers match alphabet positions.
Thus the pattern is in letters:
3 → 10 (+7)
10 → 19 (+9)
19 → 4 (+11 cyclic)
Pattern increases by +2 each time:
+7, +9, +11
Next should be +13.
4 + 13 = 17
17th letter = Q
But Q is not in options.
Now observe numbers:
3, 10, 19, 4, 16
Notice:
3 → 10 (+7)
10 → 19 (+9)
19 → 4 (19+11=30 → 30−26=4)
4 → 16 (+12)
The jump changed from +11 to +12, so maybe pattern after D is +12 (not +13).
4 + 12 = 16
So corresponding letter should be:
D (4) + 12 = 16
16th letter = P
Final Answer:
(B) P