Increasing order of electron withdrawing power of following functional groups is :

a. -CN

b. -COOH

c. $-\mathrm{NO}_2$

d. -I

$$ \text { An alkene }(\mathrm{X}) \text { on ozonolysis followed by reduction gives following products. } $$

$$ \text { The alkene }(\mathrm{X}) \text { is : } $$

$$ \text { Match the LIST-I with LIST-II } $$

Choose the correct answer from the options given below :

$$ \text { Identify the colour of compound ' } \mathrm{X} \text { ' in the sequence of the reaction. } $$