For the following glycolysis reactions, select all of the coupled reactions. NOTE: Pi stands for phosphate.
a. G3P + NAD+ + Pi ⇌ 1,3-BPG + NADH + H+
b. glucose-6-Pi ⇌ fructose-6-Pi
c. glucose + ATP ⇌ glucose-6-Pi + ADP
d. 1,3-BPG + ADP ⇌ 3-PG + ATP