Practice questions without fighting the page.

<b>Explanation:</b> <ul> <li><b>Correct answer: D</b> — Bronchitis is an inflammation of the <b>bronchi</b>, i.e., the <b>respiratory tract</b>.</li> <li><b>Key concept:</b> It affects the air passages of the respiratory system, causing coughing and mucus.</li> <li><b>Why others are incorrect:</b> A (Blood), B (Liver), C (Intestine) are not parts of the respiratory system and are not involved in bronchitis.</li> <li><b>Tip:</b> Remember “bronchi = air tubes in the respiratory tract.”</li> </ul>

<b>Correct option: A</b> — <b>Black</b> <ul> <li><b>Reason:</b> Without an atmosphere, there is no Rayleigh or Mie scattering to color the sky. Sunlight travels straight, and space appears black except where you see the Sun.</li> <li><b>Key concept:</b> Sky color arises from scattering of light by atmospheric particles; in their absence, no scattered blue light is seen.</li> <li><b>Formula/logic (brief):</b> If scattering coefficient ≈ 0, sky radiance is dominated by direct solar radiation; no diffuse blue glow.</li> <li><b>Exam tip:</b> Remember: color of sky depends on atmosphere; remove it and the sky turns black.</li> <li><b>Why others are incorrect:</b> White/Blue/Green require scattering or pigment; none occur without atmosphere.</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,