[单选题]
An transformer consists of a 500-turn vf+)n wc5:t,0+yhbg qwjhh xu-,jbw65 jv bq+rkadyq:otj*d+ .* d/ uprimary coil and a 2000-turn secondary coil. If the current in the secondarat.+r jy*ddkuoq*:d/ y is 3.0 A, what is the current in the primary?
A. $0.75 \; A$
B. $1.3 \; A$
C. $12 \; A$
D. $48 \; A$
