Main Subjects
Main Subjects MCQs With Answers
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Which is the hardest natural mineral on the Mohs scale?
AQuartz
BTopaz
CCorundum
DDiamond
Which is the largest sea by surface area?
AArabian Sea
BSouth China Sea
CCoral Sea
DPhilippine Sea
Which organ is known as the ‘master gland’?
AAdrenal
BPancreas
CPituitary
DThyroid
The ‘Hundred Years’ War’ was fought between which two countries?
AEngland and France
BFrance and Germany
CSpain and Portugal
DEngland and Spain
Which vitamin is crucial for blood health (erythropoiesis)?
AVitamin D
BVitamin A
CVitamin C
DVitamin B12
Which gas do humans inhale most from the atmosphere?
ANitrogen
BOxygen
CArgon
DCarbon Dioxide
Which is the world’s most populous country (2026 est.)?
AIndonesia
BUSA
CChina
DIndia