Several forms of negation are given for each of the following statements. Which are correct?

a. The carton is sealed or the milk is sour.

1. The milk is not sour or the carton is not sealed.

2. The carton is not sealed and also the milk is not sour.

3. If the carton is not sealed, then the milk will be sour.

b. Flowers will bloom only if it rains.

1. The flowers will bloom but it will not rain.

2. The flowers will not bloom and it will not rain.

3. The flowers will not bloom or else it will not rain.

c. If you build it, they will come.

1. If you build it, then they won’t come.

2. You don’t build it, but they do come.

3. You build it, but they don’t come.