Statement: For a third time in a row this week, the Indira Gandhi International Airport was put on a full alert today after Ait India received anonymous message that two terrorists laden with explosives were aboard its Mumbai- Delhi-Hong Kong flight. ---- An authority of Indira Gandhi International Airport
Assumptions:
I. Anonymous message is not likely to be hoax call
II. Anonymous message is likely to be hoax call
III. Alertness might be helpful is reducing the menace.

Options

A. Only I & III
B. Only II & III
C. Either I or II & III
D. Only III

Answer

A

Explanation

Why was the airport was put on a full alert? The authority must be assuming I. Hence, I is implicit but II is not. Again, to put the airport on a full alert indicates that the authority must be assuming III also.