Consider the following sequence of reactions.

$\underset{{\mathrm{NaHSO}}_3}{\overset{{\mathrm{OsO}}_4}{\to }}$A$\underset{2. \mathrm{NaOH}, \mathrm{heat}}{\overset{1. {\mathrm{HIO}}_4}{\to }}$B. The final product (B) is:

1. 

2. 

3. 

4. 

1. ${\mathrm{Cl}}^{\oplus }$

2. Cl^-

3. Cl

4. Cl²⁺

The major product expected from the  mono-bromination of phenyl  benzoate is:

(a) 

(b) 

(c) 

(d) 

(A) C₈H₁₀ $\stackrel{{\mathrm{KMnO}}_4}{\to }$ (B)  C₈H₆O₄$\underset{\mathrm{Fe}}{\overset{{\mathrm{Br}}_2}{\to }}$  C₈H₅BrO₄  (C)  (one-product only)

The structure of A in the above-mentioned reaction is-

1.		2.
3.		4.

$\mathrm{Ph}-{\mathrm{CO}}_2\mathrm{H}\stackrel{{\mathrm{SOCl}}_2}{\to }\mathrm{A}\stackrel{{\mathrm{Me}}_2\mathrm{NH}}{\to }\mathrm{B}\stackrel{\left(\mathrm{c}\right)}{\to }\mathrm{Ph}-\mathrm{CHO}$, unknown reagent (c) is:

1. LiALH₄

2. NaBH₄

3. LiAlH₄(t-BuO)₃

4. PCC/CH₂CL₂

The product (B) in the above-mentioned reaction is:

1.		2.
3.		4.

$\stackrel{{\mathrm{Cl}}_2}{\to }$ (A), Product (A) of this reaction is:

(a) 

(b) 

(c) 

(d) 

; Product (B) of this reaction is :

1.		2.
3.		4.

Cyclopentadiene is much more acidic than cyclopentane, beacuse -

 The compounds among the following that can be generated by Friedel craft acylation is/are -

I.
II.
III.
IV.