alleryStart learning →First Normal Form requires that
Aevery relation has at most three attributes
Bno attribute can be NULL anywhere in the table
Cevery row-column cell holds exactly one atomic value
Dthe primary key is a single attribute, never composite
Answer & Solution
Correct answer: C. every row-column cell holds exactly one atomic value
1NF forbids multi-valued cells, nested tables and lists inside a single cell.
NULL is allowed in 1NF, primary keys can be composite, and the attribute count is unbounded.
The atomic-single-value-per-cell rule is the only 1NF constraint that matters in standard textbooks.
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