I have no other object _______ to study.
I have no other object _______ to study.
Explanation
The sentence should be: "I have no other object than to study."
میرے پاس پڑھائی کے علاوہ کوئی مقصد نہیں۔
"Than" is used here to indicate a purpose or intention, similar to "except" or "other than".