In each of the following questions, a contextually meaningful sentence has been given. Three paragraphs have been placed next to each sentence, which may or may not be relevant to the context of the given sentence. You are required to select the most appropriate combination of paragraphs from which the given sentence can be inferred.

Following a supply outage, oxygen levels in numerous hospitals in the city fell to dangerously low levels. After a massive intervention, supplies were restored by late evening.

(i) According to the Indian Council of Medical Research, only a small percentage of those who were vaccinated tested positive. These outbreaks of illness did not, however, call into question the efficacy of immunization as the vaccines clearly protect against disease.
(ii) Hospitals in the city may soon face oxygen shortages as well. The Centre has a control team that will settle disagreements between states over oxygen delivery. To enable the smooth passing of oxygen trucks, green corridors have been established.
(iii) After a leak in a medical oxygen tank disrupted the availability at a hospital, several patients on life support suffocated. According to the State Health Minister, the leak was caused by a valve malfunction, and a high-level investigation has been ordered.

To determine the most appropriate combination of paragraphs from which the given sentence can be inferred, let us analyze the context of the sentence and compare it with the provided paragraphs.

Given Sentence:
"Following a supply outage, oxygen levels in numerous hospitals in the city fell to dangerously low levels. After a massive intervention, supplies were restored by late evening."

Let us evaluate each paragraph based on the elements of the given sentence (supply outage/disruption, falling oxygen levels/shortages in hospitals, and intervention/restoration efforts):

Paragraph (i):
This paragraph discusses vaccination, testing positive, and the efficacy of immunization. This is entirely unrelated to hospital oxygen supply shortages, outages, or intervention efforts. Thus, paragraph (i) is irrelevant.

Paragraph (ii):
This paragraph mentions that hospitals in the city may face oxygen shortages. It also mentions a Centre control team to settle state disagreements and the establishment of "green corridors" to enable the smooth passing of oxygen trucks. This directly links to the context of oxygen supply management and the "massive intervention" (like green corridors and control teams) to restore or maintain supplies. Therefore, paragraph (ii) is contextually relevant.

Paragraph (iii):
This paragraph describes a leak in a medical oxygen tank that disrupted the availability of oxygen at a hospital, leading to suffocation. This matches the "supply outage" and "oxygen levels falling to dangerously low levels" mentioned in the given sentence. Therefore, paragraph (iii) is also contextually relevant.

Combining the relevant contexts, paragraphs (ii) and (iii) contain the background events and actions (outage/disruption and intervention/restoration) from which the given sentence can be logically inferred.

Therefore, the correct option is Only (ii) and (iii).