When any one of the subjects joined by or or nor is plural, the plural subject is placed next to the verb of and the verb takes the plural form Doubt is that if the plural verb is placed before then which verb will come? For example, The players or the captain , _____ responsible for the defeat in the cricket match.

The rule says "When any one of the subjects joined by 'or' or 'nor' is plural, the plural subject is placed next to the verb and the verb takes the plural form", so we cannot use the plural subject first, but the singular subject followed by 'or' or 'nor' and again the verb takes the plural form. Hence in the given e.g; the sentence will be like this:

The Captain or the players are responsible for the defeat in the cricket match.