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Assertion : underset("-carbethoxy- 2-butenoic acid.")(CH-underset(COOC_(2)H_(5))underset(|)(C)=CH-COOH) Reason: Principal functional group gets lowest number followed by double bond or triple bond.

Answer»

If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.

Solution :`OVERSET(4)(C)H-underset(COOC_(2)H_(5))underset(|)overset(3)(C)=overset(2)(CH)-overset(1)(C)OOH`
Here, since -COOH is the principle functional grou, it gets the LOWEST number than the secondary functional GROUP (3-carbethoxy). So it is 3-carbethoxy-2-butenoic acid.


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