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)`

The molecular mass of a solute cannot be calculated by one of the following relations
A. `M_(B) = (K_(b) xx 1000 xx w_(B))/(Delta T_(b) xx w_(A))`
B. `M_(B) =(w_(B) xx RT)/(piV)`
C. `M_(B) = (p_(0) xx w_(B) xx M_(A))/((p_(0)-p) xx w_(A))`
D. `M_(B) = (Delta T_(b))/(K_(b)) xx 1000 (w_(B))/(w_(A))`