Identify the FALSE statement from the following, pertaining to the design of concrete structures -

Correct option is C

Whether a rectangular slab behaves as one-way or two-way depends on the span ratio and the support conditions (edge continuity and stiffness), not only on geometric proportion. The usual rule-of-thumb is:
​$$\text{If } \frac{L}{B} \le 2 \Rightarrow \text{two-way action likely}, \quad\text{If } \frac{L}{B} > 2 \Rightarrow \text{one-way action likely}$$
Therefore a slab with length greater than twice its width does not always behave as two-way — in fact it typically behaves as one-way unless edge/support conditions force two-way bending.​​