A solenoid of 1.5 metre length and 4.0 cm diameter posses 10 turn per cm. A current of 5 ampere is flowing through it. The magnetic induction at axis inside the solenoid is
A. `2pixx10^(-3)` Tesla
B. `2pixx10^(-5)` Tesla
C. `4pixx10^(-2)` Gauss
D. `2pixx10^(-5)` Gauss