The total inductance of two coupled coils in the ‘series aiding’ and ‘series opposing’ connections are 1.4 x 10-3 Henry and 0.6 x 10-3 Henry, respectively. The value of mutual inductance will be:

A) 0.8 x 10-3 Henry
B) 10-3 Henry
C) 0.2 x 10-3 Henry
D) 0.5 x 10-3 Henry