Choose the word/phrase that best retains the meaning o f the underlined word/phrase in the given sentence: Despite being a brilliant scientist, he does not seem to ''get his ideas across''.

অপশনসমূহ
সঠিক উত্তর চিহ্নিত
ক make his ideas understood
খ get his ideas down pat
গ summarise his ideas
ঘ put together his ideas