Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Directions: In the following question, the first and the last parts of the sentence are numbered S₁ and S₆. The rest of the sentence is split into four parts named P, Q, R, and S. These four parts are not given in proper order. Read the sentence carefully and choose the correct order from the given options. S₁: The tiny bacterial plants that live in the soil help to prepare food for the plants we cultivate. P. Then, if a small ant hill is dug up carefully, you will find the hump-backed queen. Q. You will probably discover that you have some of the strange ant guests too. R. It can be made of two panes of glass separated by strips of wood around the edges. S. Put her in a jar with some of her workers, larvae and cocoons. S₆: They do not need sunlight as do most plants.
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
R lists useful bacteria, P explains their role, S describes types, Q ends in necessity. The logic behind this sequence often relies on connectors (like 'but', 'so', 'because'), temporal cues (like 'then', 'after that'), or thematic build-up (general to specific or cause to effect).