1.  Statement : Never before such a lucid book was available on the topic.
Assumptions :

I. Some other books were available on this topic.
II.You can write lucid books on very few topics.

A. Only assumption I is implicit.
B. Only assumption II is implicit.
C. Either I or II is implicit.
D. Neither I nor II is implicit.
E. Both I and II are implicit.

Answer: Option A

Explanation:

It follows from the statement that books on this topic were available before also but they were not 'lucid'. So, I is implicit. But a general comment as II cannot be made from the given statement. So, II is not implicit.