Yes, as long as you have margin enabled, your margin buying power will be factored in to whether your account can support an exercise.
Options involve risks, including substantial risk of loss and the possibility an investor may lose the entire amount invested in a short period of time. Before an investor begins trading options they should familiarize themselves with the Options Disclosure Document. Tax considerations with options transactions are unique, investors should consult with their tax advisor to understand the impact to their taxes.