The number of incorrect statement from the following statements are 
a) laevulose reduces tollens reagent to metallic silver     
b) In maltose the two glucose units are joined by $\alpha (1,4)$ hemi acetal linkage
c) $\alpha -$ methyl glucoside react with 5 moles of acetyl chloride 
d) Glucose and galactose are C - 4 anomers  
e) Insulin contain two polypeptide chains smaller chains contain 21 amino acids and larger peptide contains 30 amino acid residues insulin contain 50 peptide linkages 
f) Specific rotation of an aqueous solution of Glucose is + 52.7, this solution contains  63.98% $\alpha -form,$ 36%   $\beta -form$ and 0.02% open chain form.
g) Amylopectin is water soluble branched chain polymer, it gives Blue color with iodine solution