Currents changing with time will produce _ field.

Explanation

When a current changes over time, it generates an electromagnetic field, which combines both electric and magnetic fields that vary together. This is a fundamental principle of electromagnetism described by Maxwell's equations. Option A is incorrect because electrostatic fields result from stationary charges, not changing currents. Option B is also incorrect, as it refers to magnetic fields created by steady currents rather than changing ones. Option D is incorrect because it suggests that no correct answer exists among the options given, which is not true since 'Electromagnetic' is indeed the correct choice.