Question

Coloured strips are printed on a transparent sheet as shown below. The bottom half of this sheet is folded backwards along the PQ axis to form a semi-circle. Which of the option(s) will be a part of the resultant semi-circle?

• A. Fig A
• B. Fig B
• C. Fig C
• D. Fig D

Hint:

When dealing with transparent overlays, establish the invariant axis first. Here, the vertical columns never change order. Once you determine the upward reflection sequence of the horizontal rows, you can instantly eliminate any option with inverted row colors.

Answer 1

The Correct Option is C

Step 1: Fold along PQ.
Flipping the bottom half backward mirrors its strips and lays them over the top half.
Step 2: Overlay the colours.
The combined strip pattern of the resulting semicircle matches one option.
\[ \boxed{\text{Option 3 (Fig C)}} \]