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:
(I) All ropes are chains.
(II) All chains are strings.
Conclusions:
(I) All strings are ropes.
(II) All ropes are strings.​​

Given: 

​Statements:
(I) All ropes are chains.
(II) All chains are strings.​

​Conclusions:
(I) All strings are ropes. (False, rom the given statements, we know that ropes are a subset of chains, and chains are a subset of strings. There is no basis to conclude that all strings are ropes.)​
(II) All ropes are strings.(True, his implies that all ropes are part of the category of strings (since ropes are indirectly included within strings through chains)​​​

Correct answer is (a) only conclusion (II) follows.