I have a question. How to form a question for the following sentence - "President A is 5th president of COUNTRY". President A is any president of any COUNTRY.
How about: "Is President A [the] 5th president of [this] COUNTRY?
>> How about: "Is President A [the] 5th president of [this] COUNTRY? <<
Use "was" instead of is, unless the country is currently only on its fifth president.
"Was Monroe the 5th president of the US?"
I think Rahul means "Whichth president of this country was President A?" ... Only, there is no such word as "whichth". You'd have to ask in a bit od a round about way like "Where did President A come in the sequence of presidents in this country?"