Choosing a strike price in options instrument

Hello,

I have a general AFM question related to interest rate and foreign exchange risk calculations under the options instruments.

In a question, usually under the options, more than one strike/exercise price is given. Am I expected to show calculation of options under both the strike prices or can I choose a strike price and state a reason for choosing it (eg: closest value to libor (for interest rate questions)) and just do calculations for the chosen strike price? Will my marks be deducted?

Thank you
Anum