Select the most appropriate option that can substitute the highlighted segment in the given sentence. If there is no need to substitute it, select ‘No substitution required’.
As the news of the atomic attack reached Einstein, he is becoming aware of the glaring horror of the abuse of atomic energy.

Correct option is B

✔️ Correct option: (b) became aware of
Explanation: The sentence starts in the past tense – “as the news of the atomic attack reached Einstein” – so the second clause must maintain the same tense. “He is becoming aware” is present continuous, which is incorrect in this past context.
· Correct sentence: “As the news of the atomic attack reached Einstein, he became aware of the glaring horror…”
Grammatical rule used: When two actions happen in sequence in the past, both should be in simple past tense to maintain consistency in narration.
✦ In Hindi: जब एक वाक्य में दोनों क्रियाएं भूतकाल में घटती हैं, तो दोनों को simple past tense में रखा जाता है।
Meanings of other options:
· (a) will be aware of – future tense; incorrect here. ❌
· (c) No substitution required – incorrect as tense mismatch exists. ❌
· (d) become the awareness – grammatically incorrect phrase. ❌