Assertion: Iso-butanal does not give iodoform test. Reason: It does not have α-hydrogen.

Both Assertion and Reason are correct and the Reason is the correct explanation for the Assertion. Both Assertion and Reason are correct and the Reason is not the correct explanation for the Assertion.   Assertion is correct but the Reason is incorrect. Both Assertion and Reason are incorrect.

Assertion is correct but the Reason is incorrect.

The iodoform test is a qualitative chemical test for the detection of ketones and aldehydes carrying an α-methyl group. Iso-butanal do not have an α-methyl group[ but has α-hydrogens.