The correct statement/s is/are I. Soap is excellent for cleaning,...

The correct statement/s is/are I. Soap is excellent for cleaning, $100 \%$ broken down by bacteria in rivers and hence has no further environmental damaging repercussions. II. Soap forms an insoluble precipitate/scum when hard water containing calcium and magnesium ion is used. III. Soaps can be used for cleansing under acidic solutions.