Select the most appropriate option to fill in the blank.
Neither John _____ his friends were able to attend the party.

Correct option is B

✔️ The correct option to fill in the blank is (b) nor
Correct sentence: Neither John nor his friends were able to attend the party.
Explanation:
The conjunction pair "neither...nor" is used to join two negative alternatives. The verb "were" agrees with the second subject "his friends", which is plural.
Grammatical rule used:
Correlative conjunctions like neither...nor must be used in pairs and maintain agreement with the nearest subject.
Meanings of all options:
· (a) or – used to show a choice or alternative..
· Hindi meaning: या ❌
· · (b) nor – used after "neither" to connect two negative phrases.
· Hindi meaning: और न, न ही ✅
· · (c) and – used to connect two equal parts.
· Hindi meaning: और ❌
· · (d) but – used to show contrast.
· Hindi meaning: लेकिन ❌