Choose the correct form of verb : Many boys (play) since morning.

1. কare playing
2. খis playing
3. has been playingসঠিক উত্তর
4. ঘhave been playing.

কর্তা 'Many boys' বহুবচন, তাই সঠিক রূপ 'have been playing' (অপশন D)। keyed answer C ('has been playing') subject-verb agreement অনুযায়ী ভুল — keyed answer সন্দেহজনক।