Heterotrophic plants which feed on other plants and decaying matter are:

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Orchids

Jasmines

Conifers

Cedar plasma

answer is D.

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Detailed Solution

Concept: The plants classified as heterotrophic are those that depend on external sources of nutrition because they are unable to produce their own food. Plants that are parasitic or saprophytic may experience this.
Heterotrophic plants can be categorized into 4 main groups:
Parasitic: Cuscuta, Loranthus, and other parasitic plants are a few examples. Insectivorous: Pitcher plants and Venus fly traps are two examples of plants that feed on insects. Saprophytic: Monotropa, mushrooms, and other plants are examples of saprophytic organisms. Symbiotic: Mycorrhizae and actinorhizal plants are two examples of symbiotic plants. Orchids are symbiotic plants.
Hence, option 4 is the correct answer.

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