Choose the correct mirror image from the alternatives, when the mirror is placed on the line AB

In the following question with five alternative figures A, B, C, D, and E followed by a set of four alternatives (1), (2), (3), and (4) is provided. It is required to select the alternative which represents three out of the five alternative figures, when fitted into each other would form a complete square.

Which amongst the following figure will be formed after folding the given figure along the dotted line ?

Fill in the missing alphabet in the given figure:

Choose the answer figure in which question figure is embedded:

Which image will appear when the following transparent sheet will be folded

Here a combination of the alphabets followed by four alternatives (1), (2), (3), and (4) is given. Choose the alternative which most closely resembles the water images of the given combination:

NUCLEAR