DM-Groups and Lattice-Q8

+1 vote

(Q, *) is an algebraic structure where Q represents rational numbers and * denotes multiplication. Which one of the following statements is true?

(A).Q is an abelian group. 

(B).Q is a group but not abelian. 

(C).Q is a semigroup but not a monoid. 

(D).Q is monoid but not group.

asked Jul 8 in Discrete Maths by gbeditor (11,310 points)
reshown Jul 9 by gbeditor

1 Answer

0 votes
D is correct one
answered Jul 9 by tsnikhilsharmagate2018 (18,140 points)
@tsnikhilsharmagate2018 could you explain me the solution to this problem?