Directions: This question consists of six sentences of a passage. The first and sixth sentences are given as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly.

S1: Drugmaker Hetero on Monday said that it has received a prequalification approval from World Health Organization (WHO) for its generic version of Pfizer’s Covid-19 oral antiviral treatment candidate nirmatrelvir.
P: Hetero’s combi-pack Nirmacom will contain nirmatrelvir 150 mg (2 tablets) and ritonavir 100mg (1 tablet).
Q: WHO made a strong recommendation for nirmatrelvir and ritonavir for mild and moderate Covid-19 patients at highest risk of hospital admission, such as unvaccinated, aged, or immunosuppressed patients.
R: “This is the first prequalification for a generic version of Pfizer’s Covid-19 oral antiviral drug ‘Paxlovid’, which the WHO called the best therapeutic choice for high-risk patients to date,” a note from Hetero said.
S: The cost to a patient for the entire course would be about ₹4900, an industry-source said, adding that it is currently sold to hospitals and government institutions only. It’s likely to be about $70, cost to patient for the course, in low and middle income countries, the sourced added.
S6: The product will be available by prescription and should be initiated as soon as possible after diagnosis of Covid-19 and within five days of symptom onset.