We are given three statements and are told that only one of them is true.
- Statement I says Saira has a ball. If this is true, then Mumtaz and Zeenat must have the pen and pencil, respectively.
- Statement II says Mumtaz does not have the ball. If this is true, Mumtaz must have the pencil, leaving the ball for either Saira or Zeenat.
- Statement III says Zeenat does not have the pen. This would imply that Zeenat must have the ball or the pencil, but it conflicts with the other statements.
If we assume Statement I is true, then the following holds:
- Saira has the ball.
- Mumtaz must have the pencil, and Zeenat must have the pen.
Since this satisfies all conditions, the correct answer is Saira. Therefore, the correct answer is (A).