Consider the given statements to be true even if they seem to be at variance with the commonly known facts and decide which of the given conclusions logically follow(s) from the statements.
Statements:
a. All covers are plastic.
b. All plastic are toxic.
Conclusions:
1. All plastic are covers.
2. All toxic are covers.

​Statements:
a. All covers are plastic.
b. All plastic are toxic.

​Conclusions:

1. All plastic are covers. (False, all covers are plastic, but that does not mean all plastic are covers).
2. All toxic are covers. (False, toxic includes plastic, which includes covers, but not all toxic are covers).​

Thus, correct option is (a).