According to Maxwell's hypothesis, a changing electric field gives rise to:

Explanation

Maxwell's hypothesis postulates that a changing electric field generates a magnetic field. This is a core concept in electromagnetism, encapsulated in one of Maxwell's equations, which describes how time-varying electric fields are related to magnetic fields. Option A, 'Magnetic field,' is correct because it directly aligns with this principle. Option B is incorrect because a changing electric field does not produce another electric field. Option C is incorrect because an electromotive force (e.m.f) is typically induced by a changing magnetic field, not a changing electric field. Option D is incorrect as 'pressure radiant' is not relevant to electromagnetic theory.