If the total sum of numbers on opposite faces of a cubical block is always 7, find the figure which is correct.

From the first figure to the second figure the design is inverted laterally.

Rest all has three petals except (c) which has four petals.

The third figure to the left of the sign (::) is the first and the second figures together.

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When first fold is opened the paper will look like as:
When the paper is unfolded completely it will look like as:

The outer design is reversed laterally from first figure to second figure and the wavy lines of the inner design get thick.

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