41.
Statements : Some pens are books. Some books are pencils.

Conclusions :
I. Some pens are pencils.
II. Some pencils are pens.
III. All pencils are pens.
IV. All books are pens.

42.
Statements : All the goats are tigers. All the tigers are lions.

Conclusions :
I. All the goats are lions.
II. All the lions are goats.
III. Some lions are goats.
IV. Some tigers are goats.

43.
Statements : All the books are pencils. No pencil is eraser.

Conclusions :
I. All the pencils are books.
II. Some erasers are books.
III. No book is eraser.
IV. Some books are erasers.

44.
Statements : All the research scholars are psychologists. Some psychologists are scientists.

Conclusions :
I. All the research scholars are scientists.
II. Some research scholars are scientists.
III. Some scientists are psychologists.
IV. Some psychologists are research scholars.

45.
Statements : All the locks are keys. All the keys are bats. Some watches are bats.

Conclusions :
I. Some bats are locks.
II. Some watches are keys.
III. All the keys are locks.