Select the incorrect statement about the following compound:

COOH

I

H-C-OH

I

H-C-OH

I

COOH

A) it's is optically active form

B) it has two choral carbons

C) it is erythro isomer

D) it has plane of symmetry

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane