Correct option is A
Option
(a) is the correctly spelt word.
Correct spelling is:
“Phytoremediation” — a method of cleaning polluted soil or water using plants that absorb, break down, or remove contaminants.
(Hindi meaning: पौधों द्वारा प्रदूषण-शोधन/मिट्टी-पानी की सफाई)
Example: Phytoremediation is used to remove heavy metals from contaminated soil.