Day-of-week intersection — two partial memories Abha remembers her mother’s birthday is before Friday but after Monday. Abhay remembers it is after Wednesday and before Saturday. On which day does the birthday definitely fall?

Introduction / Context:
Intersect the two ranges of possible days.

Given Data / Assumptions:

• Range 1 (Abha): Monday < Day < Friday ⇒ {Tuesday, Wednesday, Thursday}.
• Range 2 (Abhay): Wednesday < Day < Saturday ⇒ {Thursday, Friday}.

Step-by-Step Solution:
Intersection = {Thursday}.

Why Other Options Are Wrong:
They lie outside the intersection.

Final Answer:
Thursday