The resistance of an ammeter is $13 \Omega$ and its scale is graduated for a current upto $100$ amps. After and additional shunt has been connected to this ammeter it becomes possible to measure currents upto $750$ amperes by this meter. The value of shunt-resistance is-

Question

( A ) $2 k\Omega$
( B ) $0.2 \Omega$
( C ) $2 \Omega$
( D ) $20 \Omega$