Except one figure , in all other figures two similar designs intersect each other.

Correct Option: D

Except figure (4), in all other figures two similar designs intersect each other.

Except O, all others are consonants.

Correct Option: D

Except O, all others are consonants. So , figure ( 4 ) is correct answer .

In figure (3) there are oblique line while in all other figures there are straight lines.

Correct Option: C

In figure (3) there are oblique line while in all other figures there are straight lines. But all other figure are different to figure (3) .

One-fourth part of the square is shaded.

Correct Option: A

Except in figure (1), one-fourth part of the square is shaded.
In figure (1) one-third part of the square is shaded.

In figure (4) the design (T) is smaller and it does not intersect the other design.

Correct Option: D

In figure (4) the design (T) is smaller and it does not intersect the other design. So , option D is required answer .