Assertion (A): Tooth decay starts when the pH of the mouth is lower than 5.5. Reason (R) : Bee – Sting leaves an acid which causes pain and irritation.
(a) Both Assertion and Reason are true
and Reason is the correct explanation of
Assertion. ·
(b) Both Assertion and Reason are true
but Reason is not the correct -explanation
of Assertion.
(c) Assertion is true but Reason is
false.(d) Reason is true but Assertion is
false.
(e). Both Assertion and Reason are false.
Answer ( 1 )
Answer (b)
both Assertion and Reason are true
but Reason is not the correct
explanation of Assertion