Select the correctly spelt word.

Correct option is D

Option (d) is the correctly spelt word.
Correct spelling is: “ photosynthesis”—the process by which green plants and some organisms use sunlight to synthesize nutrients from carbon dioxide and water, producing oxygen as a by-product. (Hindi: प्रकाश संश्लेषण—वह प्रक्रिया जिसमें पौधे सूर्य के प्रकाश की ऊर्जा का उपयोग कर भोजन बनाते हैं)
Example: Oxygen released during photosynthesis is essential for most life on Earth.
Note (same word spelling error insight):
· Part of Speech: photosynthesis is a noun.
· Common mistakes include dropping the ‘o’ in “photo-” or misplacing the ‘y’ in synth → synthesis.