The molecular mass of a solute cannot be calculated by one of the following relations
A. `M_(2)=(K_(b) xx 1000 xx w_(2))/(Delta T_(b) xx w_(1))`
B. `M_(2)=(w_(2) xx RT )/(pi V)`
C. `M_(2)=(P_(0)^(1) xx W_(2) xxM_(1))/((P_(0)^(1)-P) xx W_(1))`
D. `M_(2)=(Delta T_(b))/K_(b) xx1000 W_(2)/W_(1)`
