Practice questions without fighting the page.

<b>Answer Explanation</b> <ul> <li><b>Correct option: C</b> - Air Quality Index measures levels of ozone (O3) among pollutants in the selected area to assess air quality.</li> <li><b>Key concept:</b> AQI combines pollutant concentrations into a single scale to indicate health risk from pollutants including ground-level ozone.</li> <li><b>Why others are incorrect:</b> <ul> <li>Option A: Not about sound pollution.</li> <li>Option B: It does not focus only on sulphur; it covers multiple pollutants.</li> <li>Option D: It does not assess colour of air.</li> </ul> </li> <li><b>Tip for exam</b>: Remember AQI = function of concentrations f(pollutants) mapped to a standard scale.</li> </ul>

8 carpal bones (Wrist).<br>
5 metacarpal bones (Palm).<br>
12 phalanges (Fingers).<br>
02 sesamoid bones at the base of the thumb.<br>
total to 27 bones in each hand.<br>.<br>

Adult Human Body-206,

In many cases, extrachromosomal DNA is contained in cytoplasmic organelles, such as mitochondria (animals), and in chloroplasts and plastids (plants).

Established in Calcutta but shifted to Mumbai in 1937.

<div class="ai-learning-box">
<div class="ai-chip">? Grammar Learning</div>
<div class="ai-answer-card"><b>✅ Correct Answer</b><p>Option D</p></div>
<div class="ai-why-card"><b>? Why?</b><p>The sentence “I went to the station before the train arrived” is correct. The order of events in the past is clear and uses the past tense consistently.</p></div>
<div class="ai-rule-card"><b>? Remember</b><p>Use the simple past for actions completed in the past.</p></div>
<div class="ai-example-card"><b>? Example</b><p>She woke up early and had breakfast.</p></div>
</div>