A) P and R only
B) Q and S only
C) S only
D) R and S only.
Correct Answer: B
Solution :: If the sheet in figure (X) is folded to form a cube, then the completely shaded face lies opposite to the half shaded face. Therefore, the cubes shown in figures (P) and (R) cannot be formed. Hence, only the cubes in figures (Q) and (S) can be formed.
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