Answers here.
Holy crap, the majority of my educated guesses were correct, giving me a final score of 41 out of 50.
Diagnosis: "40-49 I suspect you're probably wearing D&D underoos right now. For God's sake, put on some pants!"
Wrong answers marked below with the Sign of FAIL.
1) : C
2) : C (guess, 2nd guess: A)
3: B
4: C
5: C
6: A
7: E
8: D
9: C (a guess, having ruled out A and B, and probably D and E)
10: B (I first thought A, but wasn't A in module B2?)
11: C (total guess) FAIL
12: E (total guess) FAIL
13: A
14: D
15: A (total guess) FAIL
16: A (total guess) FAIL
17: D
18: A
19: E (mostly a guess)
20: C
21: D
22: C (ruling out E and D, all the rest seem unlikely, Jorune seems too late, EPT seems slightly too early, but the genre is close to correct... let's say C) FAIL
23: C (total guess)
24: C
25 : D (total guess) FAIL
26: E
27: E (educated guess) FAIL
28: C
29: B
30: C
31: E (I said A at first but something is nagging at me telling me it's E, despite the relative publication dates of the Greyhawk and Blackmoor supplements)
32: B
33: E (vague memory/mostly a guess)
34: C (mostly guess, after ruling out some of 'em) FAIL
35: B
36: D (guess)
37: B
38: D
39: D (mostly guess)
40: D
41: C (mostly guess)
42: A
43: E (nigh-total guess) FAIL
44: B (semi-guess)
45: E (mostly guess)
46: C (ruling out A, B, and D)
47: D (Guess, after ruling out B, C, and E)
48: C
49: E
50: D