Acetone is formed by the ozonolysis of which of the following?

Find out the major products $A$ and $B$ from the following reactions.

The major product $[B]$ in the following sequence of reactions is
$CH_3-C(CH(CH_3)_2)=CH-CH_2CH_3$ $\xrightarrow[(i) B_2H_6]{(ii) H_2O_2, OH^{-}} [A]$ $\xrightarrow[\Delta]{dil. H_2SO_4} [B]$

What are the products of the following reaction: $Me_2C=CHCH_3 \xrightarrow[(ii)\, H_2O]{(i)\, O_3}$?

Which of the following alkenes will yield $2-$methyl propanal on reductive ozonolysis (addition with ozone followed by the reaction with $Zn / H_2 O$)?

Which of the following alkenes does not undergo anti-Markovnikov addition of $HBr$?