Which one of the following is useful in the paper manufacturing

Which one of the following is useful in the paper manufacturing industry?

Fibrous plants
Orchids
Non-flowering plants
Plants growing in high altitude
This question was previously asked in
UPSC NDA-2 – 2015
The correct answer is A) Fibrous plants. Paper is primarily made from cellulose fibers, which are obtained from plants. Fibrous plants, particularly trees (wood pulp) and other plants like bamboo, cotton, and hemp, are rich in these fibers and are the main raw materials for the paper manufacturing industry.
Paper production relies on extracting cellulose fibers from plant sources.
While other plants exist (like orchids, non-flowering plants, high-altitude plants), the key characteristic relevant to paper making is the presence of suitable fibers. Orchids are not used for paper. Non-flowering plants is too broad; while some non-flowering plants like conifers are used, the term “fibrous plants” is a more direct description of the useful property. Plants growing in high altitude is irrelevant to their suitability for paper making based on fiber content.