Kirchoff's first law at a junction is based on the law of:
A) the heat given
B) the temperature raised
C) momentum
D) angular momentum

Dear student 

Kirchoffs junction rule states that ,algebraic sum of changes in potential around any closed circuit path (loop) must be zero.
So, No option is matching here , 
It is based on conservation of charges 
So, All option are incorrect 
Hope thi helps 
Good Luck