The correct option is A H310D
The given sequence is H304A, H306B, H308C.
Each term contains "H" as first letter.
Hence, the next term should contain "H" as the first letter.
The numbers in the sequence are 304, 306, 308.
Let us find the difference between the terms.
Difference between the 1st and the 2nd terms = 306 - 304 = 2
Difference between the 2nd and the 3rd terms = 308 - 306= 2
Therefore, to find the next term, we have to add 2 to the numeric part of each term.
Hence, the next numeric part in the term is 308 + 2 = 310
Also, fifth letters in the patter are A, B, C.
Hence, the next letter should be "D".
Hence, the next term is "H310D".