A 20 cm length of a certain solution causes right-handed rotation of `38^@`. A 30 cm length of another solution causes left-handed rotation of `24^@`. The optical rotation caused by 30 cm length of a mixture of the above solutions in the volume ratio `1 : 2` is

Options

A. left handed rotation of `3^@`
B. right handed rotation of `3^@`
C. left handed rotation of `14^@`
D. right handed rotation of `14^@`.