Choose from the four answer figures the figure that will be formed when question figure is folded into a box.

The opposite sides of cubes are

Now look at the options

 → This figure cannot be the answer because from the above figure it is clearly seen that the face S is opposite to face T but in this figure face S is adjacent to the face T.

 → This figure cannot be the answer because from the above figure it is clearly seen that the face P is opposite to face R but in this figure face P is adjacent to the face R.

 → This figure cannot be the answer because from the above figure it is clearly seen that the face U is opposite to face Q but in this figure face U is adjacent to the face Q.

 → This figure satisfies the above conditions, Hence this figure will be the answer figure.

Hence, the correct answer is Option (4).