Practice questions without fighting the page.

Refraction is the change in direction of light rays as they transition between different mediums. A figure of 1.376 is often quoted for the refractive index of the human cornea over the visible spectrum.

<b>Correct answer: A. Coromandel Coast</b> <ul> <li>The Coromandel Coast lies on the eastern coast of India, stretching from the Krishna delta in Andhra Pradesh to Cape Comorin (Kanyakumari) in Tamil Nadu, i.e., between Krishna delta and Cape Comorin.</li> <li>Other options are incorrect: <b>North Circar</b> is part of the eastern coast further north; <b>Malabar Coast</b> lies on the western coast; <b>Konkan Coast</b> is the western coastal belt between Mumbai and Goa.</li> </ul> <p>Exam fact: The Coromandel Coast forms the dominant eastern littoral and hosts major ports like Chennai, a key UPSC/SSC factoid often tested.</p>

<b>Explanation:</b> - The subject is the singular "The student" even though the phrase "as well as his teacher" adds another noun. With such parenthetical addition, the verb agrees with the main subject: singular → was going (past continuous). - Options A (have) and C (were) clash with the singular subject. B (has) could fit a different tense but not with the present continuous sense here; the given sentence uses going (progressive), so "was going" is appropriate. <b>Exam Tip:</b> When a phrase like "as well as" adds information, ignore it for subject-verb agreement; treat the main subject (before the phrase) as the one to agree with.

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<div class="ai-chip">? Phrasal Verb Learning</div>
<div class="ai-answer-card"><b>✅ Correct Answer</b><p>called off — to cancel something that was planned.</p></div>
<div class="ai-why-card"><b>? Why?</b><p>“Called off” means the strike was cancelled, so the sentence fits.</p></div>
<div class="ai-rule-card"><b>? Remember</b><p>Use “called off” for events or plans that are stopped or canceled.</p></div>
<div class="ai-example-card"><b>? Example</b><p>The parade was called off due to rain.</p></div>
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<b>Correct Answer: A</b> <ul> <li><b>Kingri-Bingri</b> and <b>Neeti-Mana</b> are mountain <b>passes</b>, not rivers, mountains, or religious sites.</li> <li>Passes are routes through mountain ranges that enable movement and trade between regions.</li> <li>Exam fact: Many UPSC/SSC questions test recognition of geographic passes as strategic transit points in the Himalayas and Karakoram.</li> </ul> <ul> <li>Why others are wrong: <ul> <li>B. Rivers — these names denote routes, not water bodies.</li> <li>C. Mountains — they are passages, not peaks.</li> <li>D. Religious places — no indication of shrines or temples here.</li> </ul> </li> </ul>