Substitute the highlighted words with the best option to improve the sentence.
"It depends whether if the applicant performs well in the interview."

Correct option is B

The correct substitution of the highlighted words is "on whether."
Explanation:
• The verb “depends” is always followed by the preposition “on” when used before a clause. So the correct structure is “depends on whether...”
• “Whether if” is incorrect because both words express conditions, and using them together is redundant and ungrammatical.
Grammatical Rule Used:
• The phrase “depends on whether” is used to express a conditional dependency.
Grammatical Rule in Hindi:
• “Depends” के साथ हमेशा “on” प्रीपोज़ीशन आता है जब यह किसी शर्त या विकल्प को दर्शाता है, जैसे कि "on whether he passes..."।
Example: It depends on whether he shows up on time.
Meanings of the other options:
· (a) whether if – incorrect; double condition words used redundantly.
· (c) whether how – incorrect combination; both can’t be used together.
· (d) when whether – incorrect conjunction pair; not a valid structure.