The correct compound structure for a ‘Though’ sentence is using but, resulting in ‘He is poor but honest’.

১. Complex sentences starting with ‘Though/Although’ always use ‘but’ to connect independent clauses in compound form.
২. ‘And’ is used when two positive or similar ideas are joined, not contrasting ones like poverty and honesty.
৩. ‘Since’ and ‘As’ are used to create complex sentences, not compound ones.

অতিরিক্ত তথ্য: In compound sentences, both parts must be independent clauses joined by a coordinator.