Question :
You are required to rearrange these parts, which are labelled P, Q, R and S to produce the correct sentence
(P)at an unnaturally high concentration and threatens the
(Q) referred to as pollution.
(R)When a substance is present in a system
(S) stability of the system, it is
Option 1: SRQP
Option 2: SPRQ
Option 3: SQRP
Option 4: RPSQ
Correct Answer: RPSQ
Solution :
The correct answer is option 4.
Hence the complete sentence is
When a substance is present in a system at an unnaturally high concentration and threatens the stability of the system, it is referred to as pollution.