question: spring and summer:autumn and winter
choices.label: A B C D
choices.text: birth, old age:sickness, death yesterday:today sunrise:sunset thunder:heavy rain
explanation: "spring and summer" and "autumn and winter" are the four seasons of a year. there are no other seasons except "spring and summer" and "autumn and winter". in buddhism, the four sufferings of human beings refer to "birth, aging" and "death, illness". aside from these four, there is no other suffering. "yesterday" and "today" represent different time periods, but there are other time periods , such as the day before yesterday. "sunrise" and "sunset" are two times of the day, but there are other times , such as noon. "thunder" and "heavy rain" indicate different weather conditions, but there are other weather conditions , such as sunny days.