The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
I invite him to my house / when I met him long ago / but he could not accept / because of his busy schedule.

Correct option is A

The error is in "I invite him to my house"
Explanation:
· The sentence mixes present tense ("I invite") with past tense ("met").
· Correct form: "I invited him to my house when I met him long ago."
Grammatical Rule:
· When referring to past events, both clauses should be in past tense.
Incorrect Options:
· (a) I invite him to my house – Should be past ("invited").
· (c) But he could not accept – Correct phrase.
· (d) Because of his busy schedule – Correct phrase.
Example:
· I invite him when I met him. (incorrect)
· I invited him when I met him. (correct)