Select the option that can substitute/replace the bracketed word correctly and complete the sentence.
They could (always) stay in, or go for a walk.

Correct option is C

The correct substitution of the bracketed word is (c) either.
Explanation: "Either" is used to indicate a choice between two alternatives. The sentence suggests two possible actions: staying in or going for a walk. (हिंदी अर्थ: या तो)
Grammatical rule used: "Either…or" is used in sentences to indicate an alternative between two choices.
Example: You can either have coffee or tea.
Meanings of the other options:
· Option (a): Had better – Suggests an obligation or recommendation. (हिंदी अर्थ: अच्छा होगा कि)
· Option (b): Not only – Indicates two related facts. (हिंदी अर्थ: न केवल)
· Option (d): Neither – Denotes "not either" of two options. (हिंदी अर्थ: न तो)