Consider the given two statements:
I. Lugol's iodine solution is always added after addition of crystal violet in Gram staining.
II. Lugol’s iodine helps in counter-staining, if required.

1. Both I and II are correct and II explains I
2. Both I and are correct but II does not explain I
3. I is correct and II is incorrect
4. Both I and II are incorrect

If a species of bacteria has multiple strains but only some are pathogenic, it is likely that unlike the non-pathogenic strains, the pathogenic strains will have:
1. Plasmids
2. Lipopolysaccharide
3. Pili
4. Flagellum