Explanation

The rules of inheritance for a childless husband are complex and depend on the specific personal law (e.g., Sunni, Shia) being followed; generally, there is no fixed fraction like ¼ without knowing other heirs present. Option A is not necessarily correct as it depends on the full set of surviving relatives. Option B is incorrect because it does not reflect the standard share in this scenario. Option D is likely correct because inheritance shares are determined by specific legal rules that might exclude a simple fractional answer.