Which of the following can give the iodoform test?

What is the product of the following reaction?

$CH_3-COOH \xrightarrow[(2)\Delta ]{(1)Ca(OH)_2} P$. Compound $P$ can show:

Select the best reagent to carry out the above conversion.

The given alkene undergoes ozonolysis: $2\text{-methylbut-2-ene}$ $\xrightarrow[{(2)\ H_2O/Zn}]{{(1)\ O_3}} \mathop X\limits_{(C_2H_4O)} + \mathop Y\limits_{(C_3H_6O)}$
$X \xrightarrow[{(2)\ H_2O}]{{(1)\ LiAlH_4}} P$
$Y \xrightarrow[{(2)\ H_2O}]{{(1)\ LiAlH_4}} Q$
Which of the following statements is incorrect for $X$,$Y$,$P$,and $Q$?

What is the correct order of reactivity of the following compounds towards a Grignard reagent?
$(I)$ $CH_3CHO$
$(II)$ $HCHO$
$(III)$ $CH_3COC_6H_5$