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Para-jumble (cardiac surgery progress): Reorder the sentences to move from the heart’s vital role, past surgical limits, present capability, and transplant success—explained by a key invention. S1 = "The heart is pump of life." S6 = "All this was made possible by the invention of heart-lung machine." Between S1 and S6, place the fragments in a medical-history arc: P = "They have even succeeded in heart transplants." Q = "Nowadays surgeons are able to stop a patient's heart and carry out complicated operations." R = "A few years ago it was impossible to operate on a patient whose heart was not working properly." S = "If heart stops we die in about five minutes." Choose the correct sequence of P–Q–R–S that completes the paragraph.

Difficulty: Easy

SRQP
SPRQ
SQPR
SRPQ

Correct Answer: SRQP

Explanation:

Given data

S1: The heart is the body's life pump.
S: If the heart stops, death follows quickly (~5 minutes).
R: Historically, operating with a failing heart was impossible.
Q: Now surgeons can stop the heart and perform complex procedures.
P: They have even succeeded in heart transplants.
S6: The heart–lung machine enabled this progress.

Concept / Approach
Establish vital function (S), recall limits (R), state present capability (Q), give pinnacle achievement (P), then explain enabling technology (S6).

Why other orders fail
SPRQ jumps to transplants before the shift from impossibility to possibility is established; SQPR places transplant before the general present capability; SRPQ ends with a weaker present capability after citing the pinnacle success.

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