Which component of starch is a branched polymer of `alpha-`glucose and insoluble in water ?

Which component of starch is a branched polymer of `alpha-`glucose and insoluble in water ?
Which component of starch is a branched polymer of `alpha-`glucose and insoluble in water ?
Which component of starch is a branched polymer of `alpha-`glucose and insoluble in water ?
Which component of starch is a branched polymer of `alpha-`glucose and insoluble in water ?

water