Choose the missing terms out of the given alternatives : a, d, c, f, ? , h, g, ? , i

The correct answer is A. e, j.

The given sequence is a simple alternating repetition of two letters, a and d. The first letter of each pair is followed by the second letter of the next pair, and so on. Therefore, the missing terms are e and j.

Option B is incorrect because k is not a letter in the given sequence.

Option C is incorrect because f is not followed by j in the given sequence.

Option D is incorrect because j is followed by e in the given sequence.