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Assertion (A): Glaciogenic seeding can only work where supercooled liquid water is present.
Reason (R): The added nuclei have nothing to act upon in a cloud that has already glaciated.

  • A.A is false but R is true
  • B.Both A and R are true, and R is the correct explanation of A
  • C.Both A and R are true, but R is not the correct explanation of A
  • D.A is true but R is false

Answer: B

Both are true and the reason gives the requirement, and identifying suitable clouds is a large part of any operational programme. Seeding a glaciated cloud accomplishes nothing whatever, however much agent is released.

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