In statements (A) and (B), the common code word is 'pod' and the common word is 'boy'.
So, 'pod' stands for 'boy'.
In statements (A) and (D), the common code word is 'joc' and the common word is 'very'.
So, 'joc' stands for 'very'.
So, in (A) 'na' stands for 'bright'.