প্রথমে আমিই তোমাকে সাহায্য করেছিলাম।
It had been I who first helped you.
It is I who have helped you first.
It is I who helped you first
I helped you first.
সঠিক উত্তর:
It is I who helped you first
ব্যাখ্যা ও নোট:
It is I (আমিই) এরপর relative pronoun 'who' বসে এবং antecedent 'I' অনুযায়ী verb 'helped' বসেছে।