1).1/6 + 1 1/3 + 2 1/9=N

A.11 4/18
B.18 4/11
C.4 11/18
D.4 18/11

2).what is the answer when 2 1/5 subtracted 1 7/10

A.19/20
B.1 19/20
C.2 19/20
D.3 19/20​