The ratio of the amounts of heat developed in the four arms of a balanced Wheatstone bridge, when the arms have resistance P=100Ω;Q=10Ω;R=300Ω and S=30Ω respectively is
A. 3:30:1:10
B. 30:3:10:1
C. 30:10:1:3
D. 30:1:3:10