If A′ = A; where A′ is the transpose of A then |A| = |A'| But it is not necessary that |A| = 0, so A is not a singular matrix. Hence, Statement 1 is wrong. Given, A3=I Taking determinants both sides, we get ⇒|A3|=|I|=1 ⇒|A|=1 Here, |A|neq0 so, A is a non-singular matrix Hence, option (2) is correct.