Q118Section C (Part C)118 of 120

Properties of a block design from its incidence matrix

If the incidence matrix of a block design is given by $N=\begin{bmatrix}1&1&1&0\\1&1&0&1\\1&0&1&1\\0&1&1&1\end{bmatrix}$ , then which of the following statements are true?

Multiple select: one or more options are correct. Select all of them, then submit — marks need the exact set.

Select every correct option, then submit.

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