Three statements are given followed by three conclusions I, II and III. Assuming the statements to be true even if they seem to be variance from commonly known facts, decide which of the conclusions logically follow(s) from the statements.

statement:

All passengers are engineers.

Some passengers are clerks.

No engineer is geographer.

conclusion:

।. Some engineers are clerks.

II. No passengers is a geographer.

III. All geographers are clerks.