In the following questions, the first and the last part of the sentence/passage are numbered 1 and 6. The rest of the sentence/passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence (s) and find out which of the four combinations is correct. Then find the correct answer.

1. In a first, a robotic exoskeleton device has enabled a 39-year old former athlete, who had been completely paralysed for four years.
P. This is the first time that a person with chronic, complete paralysis has regained enough voluntary control to actively work with a robotic device.
Q. The athlete's leg movement also resulted in other health benefits.
R. to control his leg muscles and take thousands of steps.
S. In addition to the device, the man was aided by a novel non-invasive spinal stimulation technique that does not require surgery.
6. including improved cardiovascular function and muscle tone.

• SPQR

• RPSQ

• PQRS

• PQRS