In majority of dicotyledonous plants, the direct elongation of the -A- leads to the formation of -B- Select the correct to option to fill the blanks.

In majority of the dicotyledonous plants, the direct elongation of the radicle leads to the formation of primary root which grows inside the soil. It bears lateral roots of several orders that are referred to as secondary, tertiary, etc. roots. The primary roots and its branches constitute the tap root system.