Final answer:
Pteridophytes, such as ferns, can be used as both medicines and ornaments. Some ferns have medicinal properties and are used in traditional medicine, while others are primarily grown for their aesthetic value as ornaments.
Step-by-step explanation:
Pteridophytes are a group of plants that include ferns, which are used for both medicinal and ornamental purposes. Some ferns have medicinal properties and are used in traditional medicine to treat various ailments. Examples include the bracken fern, which has been used as a food source and medicinal remedy for sore throat, and the licorice fern, which is used for its sweetness and medicinal properties.
While pteridophytes can be used as both medicines and ornaments, there are some pteridophytes that are used only as ornaments and not for medicinal purposes.
Therefore, the correct answer to the given options would be:
a) Pteridophytes used as medicines and ornaments: Examples include the bracken fern and the licorice fern.
b) Pteridophytes used as ornaments only: There are other ferns that are primarily grown for their aesthetic value.
c) Pteridophytes used as medicines only: There are pteridophytes that have medicinal properties but are not cultivated for ornamental purposes.
d) None of the above: This option is incorrect as there are pteridophytes that fit into the categories mentioned above.