Which of the following products is $NOT$ formed by the reaction between methane and chlorine in the presence of sunlight?

In the following reaction $C$ is,$CH_3-CH=CH_2 + HCl$ $\xrightarrow[\text{Peroxide}]{\text{Organic}} A$ $\xrightarrow[\text{Moist}]{\text{Ag}_2\text{O}} B$ $\xrightarrow{\text{EtMgBr}} C$

Given below are two statements:
Statement $I$: Methane can be prepared by decarboxylation of sodium ethanoate,Kolbe's electrolysis of sodium acetate and reaction of $CH_3MgBr$ with water.
Statement $II$: Methane cannot be prepared from unsaturated hydrocarbons and by Wurtz reaction.
In the light of the above statements,choose the correct answer from the options given below.

Give the order for the substitution of hydrogen atoms in alkane compounds.

Consider the following:
Statement-$I$ : Kolbe's electrolysis of sodium propionate gives $n$-hexane as product.
Statement-$II$ : In Kolbe's process,$CO_2$ is liberated at the anode and $H_2$ is liberated at the cathode.
The correct answer is:

If the octane number of a sample of petrol is $40$,it is a mixture of........and............