Concept:
Under Section 24 of the Indian Penal Code (IPC), an act is said to be done dishonestly when it is done with the intention of causing wrongful gain or wrongful loss.
• Wrongful gain = unlawful gain by one person.
• Wrongful loss = unlawful loss to another person.
• This defines dishonest intention.
Step 1: Understand the IPC definition.
Section 24 IPC states:
Wrongful gain + Wrongful loss = Dishonesty
Step 2: Apply to the question.
The person acts with intention to cause:
Wrongful gain or wrongful loss
which directly matches dishonesty.
Step 3: Eliminate incorrect options.
• Fraudulently -- different concept under IPC
• Intentionally -- too broad
• Dishonestly -- exact legal term
• Voluntarily -- unrelated
Step 4: Final conclusion.
Hence, the correct answer is:
\[
\boxed{\text{Dishonestly}}
\]