Step 1: Recall the fixed idiom for column I item 1, "As deaf as."
The standard English idiom is "as deaf as a post," used for someone who does not listen or hear at all. So 1 matches with 7 (a post), giving 1-7.
Step 2: Recall the idiom for item 2, "As bitter as."
The set idiom is "as bitter as gall," gall being a very bitter substance from the body, used for extreme bitterness in taste or feeling. So 2 matches with 5 (gall), giving 2-5.
Step 3: Recall the idiom for item 3, "As unpredictable as."
"As unpredictable as the weather" is the common phrase, since weather can change without warning. So 3 matches with 8 (the weather), giving 3-8.
Step 4: Recall the idiom for item 4, "As slippery as."
"As slippery as an eel" is the fixed idiom, since an eel is hard to hold or catch. So 4 matches with 6 (an eel), giving 4-6.
Step 5: Combine all four pairs and check the options.
The full set is 1-7, 2-5, 3-8, 4-6. This matches option B exactly.
Final Answer:
The correct combination is 1-7, 2-5, 3-8, 4-6, option B. \[ \boxed{\text{Option B}} \]