Directions: In the question given below, rearrange the sentences in the correct order, and choose the correct option. The first and sixth (last) statements are given in the right sequence and are fixed.

1. The Rubik’s cube was invented in the ’70s, by Erno Rubik.

P. He had studied sculpture and architecture at the same university.

Q. He soon realized the object was a handy tool for teaching algebraic group theory and spatial relations.

R. Rubik’s own first attempt to solve the cube took a month.

S. He was a Hungarian professor of design at the Academy of Applied Arts and Design.

6. Not to mention, it was a marvel of structural design.