Which of the following glucoses and glucose derivatives are capable of undergoing mutarotation? (a) -D-Glucopyranose; (b) methyl

Which of the following glucoses and glucose derivatives are capable of undergoing mutarotation? 

(a) α-D-Glucopyranose; 

(b) methyl α-D-glucopyranoside; 

(c) methyl a-2,3,4,6-tetra-O-methyl-D-glucopyranoside (i.e., the tetramethyl ether at carbon 2, 3, 4, and 6); 

(d) α-2,3,4,6-tetra-O-methyld-glucopyranose; 

(e) α-D-glucopyranose 1,2-acetone acetal.