The true statement from the options you've provided is:
Plants undergo both photosynthesis AND cellular respiration.
This is accurate because plants perform photosynthesis to convert sunlight into glucose and oxygen, and then they carry out cellular respiration to convert that glucose into ATP, which they use for energy.
The other statements are not correct:
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Photosynthesis is not the "exact opposite" of cellular respiration in a simple sense; while they involve the same molecules (glucose and oxygen in photosynthesis, and carbon dioxide and water in respiration), they are processes that occur in different contexts and with different purposes.
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Photosynthesis does happen primarily in plants, but many other organisms (like some algae and bacteria) also perform it. Additionally, respiration occurs in nearly all living organisms, including plants and animals.
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Photosynthesis does not primarily make ATP in a directly usable form; instead, it produces glucose, which organisms then break down in cellular respiration to produce ATP.
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