Explanation:-

Answer: Option D. -> Arthropoda
ARTHROPODA IS THE LARGEST PHYLUM OF ANIMAL KINGDOM BECAUSE AROUND 2/3RD OF ALL THE NAMED SPECIES ON EARTH BELONG TO THIS PHYLUM.
ANTS, MOSQUITOES, FLIES, COCKROACHES, SHRIMP, CRABS, SPIDERS, SCORPIONS ETC. ARE EXAMPLES OF ARTHROPODS. THERE ARE THREE MAIN CLASSES OF ARTHROPODS AS FOLLOWS:
INSECTS: THIS INCLUDES MOSQUITOES, COCKROACHES, ANTS, FLIES, BEES, MOTHS, GRASSHOPPERS, BEETLES AND BUTTERFLIES
CRUSTACEANS: THIS INCLUDES CRABS, LOBSTERS, SHRIMP AND BARNACLES
ARACHNIDS: THIS INCLUDES SCORPIONS, SPIDERS AND MITES
FURTHER, A FEW OTHER CLASSES ARE ONYCHOPHORANS (VELVET WORMS), DIPLOPODS (MILLIPEDES) AND CHILOPODS (CENTIPEDES).

Explanation:-

Answer: Option D. -> Kidney
THE FUNCTIONAL UNIT OF KIDNEY IS A NEPHRON. EACH KIDNEY HAS AROUND 1 MILLION NEPHRONS THAT WORK AS TINY FILTERING UNITS WHICH REMOVE THE HARMFUL SUBSTANCES FROM THE BLOOD

Explanation:-

Answer: Option C. -> Nitrogen
PURE SUGAR IS SUCROSE C12H22O11

Explanation:-

Answer: Option D. -> Nitrates
BLUE BABY SYNDROME IS CAUSED DUE TO CONTAMINATION NITRATE CONTAMINATION IN GROUND WATER.

Explanation:-

Answer: Option B. -> 1 case in 10,000 individuals
LEPROSY IS A BACTERIAL DISEASE CAUSED BY THE BACTERIA MYCOBACTERIUM LEPRAE WHICH AFFECTS MAINLY THE SKIN AND NERVES. AS PER WHO GUIDELINES, WHEN THE NUMBER OF LEPROSY PATIENTS GETS REDUCED TO BELOW 1 CASE PER 10,000 POPULATIONS.

Explanation:-

Answer: Option A. -> Always naked
GYMNOSPERMS ARE CALLED SO BECAUSE THEY HAVE NAKED OVULES / SEEDS. IN TERMS OF PLANT EVOLUTION, THEY ARE FIRST SEED-BEARING PLANTS. THEY ARE INFERIOR TO ANGIOSPERMS BECAUSE IN ANGIOSPERMS, THE OVULES ARE COVERED.

Explanation:-

Answer: Option C. -> Lactic Acid
LACTIC ACID IS A COMMON END PRODUCT OF ANAEROBIC RESPIRATION. ANAEROBIC RESPIRATION IS THE TYPE OF RESPIRATION THROUGH WHICH CELLS CAN BREAKDOWN SUGARS TO GENERATE ENERGY IN THE ABSENCE OF OXYGEN.

Explanation:-

Answer: Option A. -> Stomach
RENNIN WHICH IS ALSO KNOWN AS CHYMOSIN, IS A PROTEOLYTIC ENZYME RELATED TO PEPSIN THAT IS SYNTHESIZED BY CHIEF CELLS IN THE STOMACH OF SOME ANIMALS. ITS ROLE IN DIGESTION IS TO CURDLE OR COAGULATE MILK IN THE STOMACH.

Explanation:-

Answer: Option A. -> Sorghum
MILLETS ARE A GROUP OF HIGHLY VARIABLE SMALL-SEEDED GRASSES, WIDELY GROWN AROUND THE WORLD AS CEREAL CROPS OR GRAINS FOR FODDER AND HUMAN FOOD. IT IS USUALLY CONSIDERED A SEPARATE CEREAL, BUT SOMETIMES ALSO KNOWN AS GREAT MILLET.

Explanation:-

Answer: Option C. -> Red & Blue
CHLOROPHYLL ABSORBS RED AND BLUE LIGHT BUT REFLECTS GREEN LIGHT.