Step 1: Understand the task.
Each word group in Column-I must be matched to the Venn diagram that shows how the three sets overlap.
Step 2: Group (a) Women, Mothers, Widows.
All mothers and all widows are women, and some women are both mother and widow, so two overlapping inner circles sit inside one big circle, which is diagram (IV). So a-IV.
Step 3: Group (b) Authors, Teachers, Men.
These three can overlap one another partially, giving three mutually intersecting circles, diagram (I). So b-I.
Step 4: Group (c) Sparrows, Birds, Mice.
Sparrows lie wholly inside Birds, while Mice stay completely separate, diagram (II). So c-II.
Step 5: Group (d) Tea, Coffee, Beverages.
Tea and Coffee both lie inside Beverages but do not overlap each other, diagram (III). So d-III.
Step 6: Read off the match.
The set a-IV, b-I, c-II, d-III is the answer.
\[ \boxed{\text{a-IV, b-I, c-II, d-III}} \]