Urgent-advise regarding on UK standard visitor application

Hello,

I am going to apply uk standard visit visa next week. Please advise me on the below questions.

(1) Should I choose "divorced" or "separated' in my relationship status. Because, our divorce is still under processing.
(2) The main visit purpose is to attend my graduation ceremony in UK. What should i choose in the reason "Tourism" or "Other reason".
(3) My previous application was refused because I only deposited into my account as two single payments and these funds are exceed my income. The reason for this fund is because my father gave me the pocket money in cash as he sold his land. What documents I need to show for the evidence.

Please advise me asap.
Many thanks in advance.