A relation R is defined on Z by xRy if 2x +5y = 0(mod7). Then the equivalence class[10] is equal to the equivalence class…

A relation R is defined on Z by xRy if 2x +5y = 0(mod7). Then the equi

1.	A relation R is defined on Z by xRy if 2x +5y = 0(mod7). Then the equivalence class[10] is equal to the equivalence class…
A.	3
B.	4
C.	5
D.	6
Answer» B. 4