For a commutative ring R with identity 1 0, let Z^* (R) =Z (R) 0 be the set of non-zero zero-divisors of R, where Z (R) is the set of all zero-divisors of R. The zero-divisor graph of R, denoted by (R), is a simple graph whose vertex set is Z^* (R) =Z (R) \0\ and two vertices of Z^* (R) are adjacent if and only if their product is 0. In this article, we find the structure of the zero-divisor graphs (Z₍), for n=p^N₁q^N₂r, where 2<p<q<r are primes and N₁ and N₂ are positive integers.
Pirzada et al. (Fri,) studied this question.