A galvanometer having a coil resistance of 100Ω gives a full scale deflection, when a current of 1 mA is passed through it. The value of the resistance, which can convert this galvanometer into an ammeter giving a full scale deflection for a current of 10 A, is :
a. 0.1Ω
b. 3Ω
c. 0.01Ω
d. 2Ω