Not legal
A PhD (Doctor of Philosophy) is usually expected to involve undertaking significant, rigorous research under the close personal supervision of a senior academic, and then presenting a paper at the university, based on the results of that research. If the university is a recognised university in Sri Lanka, then any degrees it is legally authorised to bestow would be 'legally' recognised world wide. But real recognition involves the acceptance by other universities and potential employers that the degree is comparable to PhD degrees offered by other universities around the wolrd. Otherwise the testimur is only a piece of paper.
Yes, provided they have been conducted by an officially recognised celebrant.
Yes
In Australia, a marriage performed in another country is seen as legal if the marriage is legally recognised in the country in which the marriage was performed and if the marriage would have been recognised as legally valid if it had of taken place in Australia.
Yes, assuming you were legally able to be, and legally married. With very few exceptions, a legally binding marriage performed anywhere, is recognised by the U.S.A. as a legal marriage.
Not legally or morally. The medicine isn't designed for them.
Unlikely that such action would be recognised legally without national discussion.
Legally you must be at least 18 years old to take medicine without a guardian.
Pharmacists legally sell medicines in the USA. Pharmacy Techs help pharmacists complete tasks in a pharmacy.
If the marriage is legally recognised in Australia and she has Australian citizenship then yes you will get Australian citizenship.
no
Not as long as it's purchased legally, can be legally possessed in the country to which it is shipped, and shipped in accordance with all postal authorities involved.