During seed germination, the part of the embryo which grows into root

During seed germination, the part of the embryo which grows into root is

Radicle.
Plumule.
Cotyledon.
Epicotyl.
This question was previously asked in
UPSC NDA-1 – 2021
The correct answer is (A) Radicle.
During seed germination, the embryo within the seed develops into a seedling. The radicle is the embryonic root, which is the first part of the seedling to emerge from the seed during germination. It grows downwards into the soil to anchor the seedling and absorb water and nutrients.
The plumule is the embryonic shoot, which develops upwards into the stem and leaves. Cotyledons are seed leaves that store food or perform photosynthesis temporarily. The epicotyl is the part of the embryonic shoot above the cotyledons.