Consider the following statements:
- Boolean expressions and logic gates networks correspond to labelled acyclic digraphs
- Optimal boolean expressions may not correspond to simplest networks.
- Choosing essential blocks first in a Karnaugh map and then greedily choosing the largest remaining blocks to cover may not give an optimal expression
Which of these statement(s) is/are correct?
- i only
- ii only
- i and ii
- i, ii, and iii