Each item consists of six sentences of a passage. The first and sixth sentences are given as S1 and S6. The middle four sentences have been jumbled up and labelled as P, Q, R and S. Find the proper sequence.
S1: Biology is the youngest of the formalized disciplines of natural science.
S6: Life expectancy of human beings has dramatically changed over the years.
P: However, the twentieth century and certainly the twenty-first century has demonstrated the utility of biological knowledge in furthering human welfare, be it in health sector or agriculture.
Q: The discovery of antibiotics, and synthetic plant-derived drugs, anaesthetics have changed medical practice on one hand and human health on the other hand.
R: Applications of physics and chemistry in our daily life also have a higher visibility than those of biology.
S: Progress in physics and chemistry proceeded much faster than in biology.
The correct sequence should be
- AQPRS
- BPRQS
- CRPQS
- DSRPQ
Explanation
S contrasts physics/chemistry's faster progress, R extends the comparison to visibility, P pivots with 'However' to biology's twentieth-century utility, Q gives the antibiotic evidence, and S6 states the result (changed life expectancy). SRPQ; the other orders break the S–R comparison or the P–Q evidence chain.