বিশ্বব্যাপী করোনাভাইরাস বর্তমানে নিয়ন্ত্রণে এসেছে।- ?

The correct answer is A: "At present, the Corona virus has come under control in all over the world," due to several factors regarding grammatical accuracy, clarity, and effective communication.

First, option A uses the present perfect tense "has come under control," which appropriately reflects the current status of the coronavirus. This tense indicates that the action (coming under control) has relevance to the present situation, aligning well with the phrase "currently" or "at present."

Second, the phrase "all over the world" effectively conveys the global aspect of the situation, indicating that this control is not limited to a specific region but applies globally.

Options B and C present grammatical issues. For instance, option B uses "came under controlled," which is incorrect since it mixes past and present tenses and misuses the word "controlled." Similarly, option C has a tense inconsistency with "has been now come under controlled," undermining clarity.

Option D states "is now under controlled," which incorrectly uses the word "controlled" in an adjectival form instead of the appropriate "control." This results in a grammatically incorrect phrase.

In conclusion, option A is clear, grammatically correct, and accurately reflects the statement's intended meaning, making it the best choice.