Fruity smell is given by

$C_6H_5(CH_2)_5COCl$ $\xrightarrow[CS_2]{AlCl_3}$ $(A)$ $(C_{12}H_{14}O)$ $\xrightarrow[H_3O^{\oplus}]{KMnO_4, \Delta}$ $(B)$. Compound $(B)$ is

Heating chloroform with aqueous sodium hydroxide solution forms:

Which of the following esters cannot undergo Claisen self-condensation?

How many organic products will be formed when the following compound undergoes decarboxylation?
(Image: $A$ substituted cyclopentane ring with two $-COOH$ groups at the same carbon atom,and two $-CH_3$ groups at adjacent carbons.)

$CH_2(CO_2Me)_2 + ? \xrightarrow[(i) \ Na]{(ii) \ AcOH} CH(CO_2Me)_3$
Which of the following reactants will complete the above reaction?