Which of the following responds to a positive $(+ve)$ iodoform test?

Which compounds among the following give a positive iodoform test?

Consider the following reaction sequence:
$CH_3CHO$ $\xrightarrow[(ii) H_3O^+]{(i) CH_3MgBr} A$ $\xrightarrow[\Delta]{Conc. H_2SO_4} B$ $\xrightarrow[(ii) H_2O, OH^-]{(i) B_2H_6} C$
$A$ and $C$ are:

In the following reaction: $CH_3-CH_2-CH(OH)-CH_3 \xrightarrow[475 \ K]{H_2SO_4}$

Tertiary butyl alcohol gives tertiary butyl chloride on treatment with

In the given table,identify the incorrect option. The digit in the box indicates the moles of that substance.

Reactant

$HIO_4$ consumed

$HCO_2H$ formed

$HCHO$ formed