This section manages the mind teasing problems of development of squares by the blend of a few sections by selecting them from a gathering of given choices (for the most part five in number). The following discussion will help us in solving of such kind of problems:

- Select a piece which contains a right point between two adjoining external edges.
- Attempt to fit another piece in its hallow spaces.
- If you can't locate any such piece, select another piece having a right angle.
- Repeat the methodology with various arrangements of such pieces.
- At long last, with the two pieces fitting into each other, locate the third piece which fits into the other two chose ones, to get finish square.

By observing clearly, figure A fits into figure C to form a complete square and also figure B fits into figure E to form a complete square as shown below:
Figure D doe not fit any of the alternative figure to form a complete square.
Therefore, figure D is the answer.

Select the largest figure which contains at least one angle of 60 degrees.
Clearly, figure B is larger.
Now, figure C fits into it as shown below:
Atlast, figure D fits into the above combination to form a complete equilateral triangle as shown below:
Therefore, the figures B, C and D fit into each other to form a complete equilateral triangle.
Hence, option (b) is correct answer.

Combination of figures B, C and D, the square will be formed as shown below:
Therefore, option (c) is correct answer.

Combining figures A, D and E, square is formed as shown below:
Therefore, option (b) is the correct answer.

Figures A and E form a square.
Other pair is figure B and D, also form a square.
The odd figure which does not fit into any of the other alternative figures to form a complete square is figure C.
Hence, figure C is the correct answer.

By observing, it is clear that figure D fits exactly into figure X to form a complete square as shown below:
Therefore, figure D is the correct answer.

By observing, it is clear that figure B fits exactly into figure X to form a complete square as shown below:
Therefore, figure B is the correct answer.

By observing, it is clear that figure D fits exactly into figure X to form a complete square as shown below:
Therefore, figure D is the correct answer.

By observing, it is clear that figure C fits exactly into figure X to form a complete square as shown below:
Therefore, figure C is the correct answer.

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