Final answer:
Techniques to achieve 1NF include removing redundancy and propagating dependency. The correct answer is a) Duplicates, Redundancy.
Step-by-step explanation:
The question refers to the techniques used to achieve First Normal Form (1NF) in database normalization. To achieve 1NF, the database tables should:
- Remove redundancy.
- Propagate dependency.
So the correct answer is: a) Duplicates, Redundancy. In 1NF, all entries in a column (field) must be unique (no duplicates), and each record must contain the same number of fields (propagation of dependencies).