Assertion Special functions such as trigonometric, logarithmic and ...

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Assertion Special functions such as trigonometric, logarithmic and exponential functions are dimensionless.
Reason A pure number, ratio of similar physical quantities, such as angle and refractive index, has no dimensions.
- (a) Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
(c) Assertion is correct but Reason is incorrect.
(d) Assertion is incorrect but Reason is correct.
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