Read the given statements and conclusions carefully. You have to take the given statements to be true even if they seem to be at variance from commonly known facts and decide which conclusion(s) logically follow(s) from the given statements.
Statements:
All chairs are tables.
Some tables are beds.
Conclusions:
(I) All beds are chairs.
(II) Some tables are chairs.

​Statements:
All chairs are tables.
Some tables are beds.

Conclusions:
All beds are chairs. (False, no direct relation between beds and chairs).
Some tables are chairs. (True, Since all chairs are inside the table category, it is automatically true that at least some tables must be chairs).

Thus, correct option is (b).