Which of the following is a correct description regarding the animal?

  • A
    Earthworm - The alimentary canal consists of pharynx,oesophagus,stomach,gizzard,and intestine in sequence.
  • B
    Frog - The body is divided into head,neck,and trunk.
  • C
    Rat - The left kidney is situated at a slightly higher level than the right one.
  • D
    Cockroach - It possesses $10$ pairs of spiracles ($2$ pairs in the thoracic region and $8$ pairs in the abdominal region).

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Match List-$I$ with List-$II$:
List-$I$ List-$II$
$A$. Tranquilizers $I$. Anti blood clotting
$B$. Aspirin $II$. Salvarsan
$C$. Antibiotic $III$. Antidepressant drugs
$D$. Antiseptic $IV$. Soframicine

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If one of the lines of the pair of straight lines $ax^2 + 2hxy + by^2 = 0$ bisects the angle between the coordinate axes,then:

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