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Science and Inventions

What term is best described by the following? the chemical element with the symbol O that is essential for human respiration.

Difficulty: Medium

About this MCQ

This Medium Science and Inventions question asks: What term is best described by the following? the chemical element with the symbol O that is essential for human respiration. The correct choice is C. Oxygen. Read the options below, commit to one, then use the explanation to see why that choice holds and why the others do not.

Science and Inventions items like this one are written for Pakistan exams such as CSS, FPSC, PPSC, and NTS. The difficulty label is a hint about how much of the topic the stem assumes, not a score. Tags and exam names, when they are present, tell you where else the same idea is tested. Previous and next links stay in Science and Inventions so you can continue the subject. Related questions point at nearby stems if you want another angle on the same idea.

Treat the explanation as part of the question, not a footnote. If you missed it, reread the stem against the correct option before you open the next Science and Inventions item. A timed quiz is the same pool with a clock and a score. A past paper is a full sitting rather than this single question.

Correct answer

C. Oxygen

Explanation

Oxygen (option C) is the accepted answer to “What term is best described by the following? the chemical element with the symbol O that is essential for human respiration.”. Option A (The Wright Brothers) does not fit this question. Option B (Thomas Edison) does not fit this question. Option D (DNA) does not fit this question. For this Science and Inventions question, the accepted answer is Oxygen.

Source: General Knowledge Official Reference Guide

Tags: FPSC, PPSC, General Knowledge, NTS, Science and Inventions

Submitted by: MCQsHub Editorial

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