LG Game 4 Question 21 Explanation, by LSATHacks
For this question, we’d need to check each answer choice against our diagrams. The correct answer choice would give a situation that cannot exist in any of our diagrams. However, if you noticed that either J or G meet on Thursdays in every single diagram, then you should be very wary of any other person being the only meeting on Thursday.
Rules and Scenarios: 
C is CORRECT. Either J or G must go on Thursday due to Rule 2, so H can’t go by himself on Thursday.
A is incorrect since then J and G could go on Thursday and Friday. This would also ensure that K and G have the right gap between them. This is possible in Scenarios 3 and 4.
B is incorrect since G can go by himself on Thursday in Scenario 2.
D is incorrect. We saw in Question 20 that K can be the only client on Friday.
E is incorrect. Scenario 2 says that L can go on Friday morning.
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