Which of the below reactions produce carboxylic acids ?
I. `HC -= C-CH= underset(CH_3)underset(|) C-CH_2OH overset(MnO_2)underset(CH_3COCH_3)to`
II. `Ph -C""Cl_3overset((i) aq.NaOH)underset((ii) H_2O//H^(oplus)) to`
III. `C_2 H_9 Br overset((i) Mg) underset((iii) H_2O//H^(oplus)) underset((ii) CO_2)to`
IV. `CH_3 CH= CHCH_3 overset(K_2Cr_2O_7//H_2SO_2)underset(Delta)to`

Options

A. I,II,III
B. II,III,IV
C. I,III,IV
D. I,II,IV

Answer

B

Explanation

n reactoin (II), (III), (IV) acids are formed . But in reaction (I) aidehyde is formed.