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Assertion (A): Large hail is associated with severe convective storms.
Reason (R): Only a strong updraught can support a stone long enough for it to grow large.

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

Answer: C

Both are true and the reason gives the requirement, and terminal velocity rises with size so the updraught must strengthen too. Hail size is therefore used as an indicator of storm severity. Reports of large hail are treated as evidence of a severe storm.

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