Correct Answer: E
Explanation:
The following simple chart may be helpful in answering the questions:
| Disease | When communicable | Symptom |
|---|
| J | Always | Red splotches
appear Day after Inf. |
| K | Day after infection | Blue lips or red splotches
appear day of Inf. |
| L | Only with J | Swollen ears
appear Day after Inf.
Negated by disease K |
Tuesday:Peter and Paul
Wednesday: Paul and Mary
If Peter was infected with Disease K on Monday, then:
I. He could have infected Paul with Disease K on Tuesday (one day later); Paul in turn could have infected Mary on Wednesday. Thus, Mary could have blue lips. True
II. Mary’s ears could not have been swollen because simply passing on Disease K would not manifest such a symptom. FALSE
III. Peter could have given Paul Disease K on Tuesday; Paul in turn could have given it to Mary on Wednesday. Red splotches is also a symptom of Disease K, which Mary could have shown on Wednesday. True