Statement: The library has over 10,000 books. Conclusions: I. It is a big library. II. It has books on all subjects. MCQ with Answer and Explanation

Statements:
1. All A are B.
2. All B are C.
3. All C are D.
Conclusions:
I. All A are D.
II. Some D are B.
Which conclusion(s) logically follow?

Statement:
The meteorology department has predicted heavy rainfall and thunderstorms for the next 48 hours.
Conclusions:
I. Citizens should carry umbrellas when going out.
II. Flights might get delayed or cancelled.
Which conclusion(s) logically follow?

Statement: No dogs are allowed in the mall. Conclusions: I. Security guards check for dogs. II. This rule applies to all visitors.