Direction: The following passage consists of six sentences. The first and the sixth sentences are given. The middle four sentences in each have been removed and jumbled up. These are labelled P, Q, R and S. You are required to find out the proper sequence of the four sentences and choose the correct order from the options.

S1- Scientists have for the first time managed to edit genes in a human embryo. 

P- It is caused by a mutation in a particular gene and a child will suffer from the condition even if it inherits only one copy of the mutated gene.

Q- Its main aim is to repair a genetic mutation, fueling hopes that such procedures may one day be available outside laboratory conditions.

R- The cardiac disease causes sudden death in otherwise healthy young athletes and affects about one in 500 people overall.

S- In results announced in Nature this week, scientists fixed a mutation that thickens the heart muscle, a condition called hypertrophic cardiomyopathy.

S6- Correcting the mutation in the gene would not only ensure that the child is healthy but also prevents transmission of the mutation to future generations.