(1) If both assertion and reason are true and reason is the correct explanation of the assertion...

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(1) If both assertion and reason are true and reason is the correct explanation of the assertion.
(2) If both assertion and reason are true but reason is not correct explanation of the assertion.
(3) If assertion is true, but reason is false.
(4) Assertion is false, reason is true
Assertion (A): An electric bulb becomes dim, when the - electric heater in parallel circuit is switched on.
Reason (R): Dimness decreases after sometime.
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