Assertion : A thin stainless steel needle can lay floating on a still water surface. Reason : Any object floats when the buoyancy force balances the weight of the object.

• A

  If both assertion and reason are true and reason is the correct explanation of the assertion
• Correct answer
  B

  If both assertion and reason are true but reason is not the correct explanation of the assertion
• C

  If assertion is true, but reason is false
• D

  Both assertion and reason are false statements.

Hence, the correct answer is option: 'B'.