Amylopectin is composed of:

Step 1: Amylopectin Definition — Amylopectin is the branched component of starch, composed of thousands of $\alpha\text{-D-glucose}$ units.

Step 2: Linkage and Branching — Linear parts of the molecule are connected by $\alpha\text{-1,4-glycosidic}$ bonds. Branch points are established by $\alpha\text{-1,6-glycosidic}$ bonds.

Step 3: Final Selection — The correct combination matches option (a).

Key Point: Comparison: Amylose is linear ($\alpha\text{-1,4}$ only), while amylopectin and glycogen are branched ($\alpha\text{-1,4}$ and $\alpha\text{-1,6}$).