Two batteries with e.m.f 12 V and 13 V are connected in parallel across a load resistor of `10 Omega`. The internal resistances of the two batteries are `1 Omega` and `2 Omega` respectively. The voltage across the load lies between :
A. 11.4V and 11.5 V
B. 11.7V and 11.8V
C. 11.6V and 11.7V
D. 11.5V and 11.6V