The correct option is A Monomial
As a×b×c
=b×c×a
=c×a×b
=abc=bca=cab
All the three terms are same.
So they are like terms and can be added to get a single term.
abc+bca+cab=3abc or 3bca or 3cba
An algebraic expression consisting of one term is known as monomial.
So, it is a monomial.