16. if an observer measures an uniform electric field of 4 units (cgs) corresponding to a static charge distribution and a second observer, moving relativistica

16. If an observer measures an uniform electric field of 4 units (CGS) corresponding to a static charge distribution and a second observer, moving relativistically with respect to the first observer, measures an electric field of 5 units. The second observer should find a magnetic field of strength (A) 2 units (B) 1 unit C) 41 units (D) 3 units