The correct option is A 6x2y2
Expressions that contain only oneterm is called a monomial.
4+5x2 has two terms. Hence it is a binomial.
6x2y2 has only one term. So it is called a monomial.
3abc+5bc has two terms. Hence it isa binomial.
ab+bc+ca has three terms. Hence, it is an example of trinomial.