A. With the second wave of infections and the rise in COVID-19 positive cases in India, the necessity for integral medicines, hospital beds and oxygen supplies has gone up incrementally.
B. In the gloomy battle against the novel coronavirus pandemic, what has emerged as most reprehensible is the brazen attempt by profiteers in filling the gap following the desperation of many patients and families.
C. For example, we come across information about government helpline numbers being circulated widely.
D. The Twitter handles of politicians and administrative executives often reiterate the dependability of these helplines.

The context of the given paragraph is regarding the fact that with the second wave of COVID-19 glooming over our citizens in India, the black marketers are taking the advantage of the situation shamelessly. They are taking the advantage of the desperation of the families of covid patients for their profit regarding everything from hospital beds to oxygen supplies. The politicians and administrative executives are doing their best to create awareness with the help of social media to prevent these black marketers. Now after reading all the sentences carefully it is evident that sentence (B) should be the introductory sentence of the paragraph as it sets the base talking about the black marketers and the ‘desperation of many patients and families’. Statement (A) should follow (B) as it states about the desperation of the families is regarding ‘integral medicines, hospital beds and oxygen supplies’. (C) will follow (A), stating about the circulation of government helpline numbers as the ‘brazen attempt by profiteers’ stated earlier. (D) concludes the passage telling us about the government initiatives to this scam. If we exchange A and B, we get a logical paragraph. Proper sequence becomes: BACD. Hence, option C is the correct answer.