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Option 4 : If both the statements together are sufficient to answer the question
From statement I:
|
Date |
Person |
|
12 |
|
|
15 |
|
|
18 |
|
|
21 |
|
|
22 |
T |
|
24 |
U |
Hence, statement I is alone is not sufficient to answer the question.
From statement II:
|
Date |
Person |
|
|
|
Case I |
Case II |
|
12 |
P |
Q |
|
15 |
|
|
|
18 |
Q |
P |
|
21 |
|
|
|
22 |
T |
T |
|
24 |
U |
U |
Hence, statement II is alone is not sufficient to answer the question.
On combining statements I and II:
|
Date |
Person |
|
12 |
P |
|
15 |
S |
|
18 |
Q |
|
21 |
R |
|
22 |
T |
|
24 |
U |
Clearly, S has a seminar on 15th.
Hence, both the statements together are sufficient to answer the question
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