Option (ग) 'अभिमान की रक्षा के लिए' is the correct answer. The context mentions that the girl warned the bulls about the household's plan to put rings in their noses ('इनकी नाकों में नाथ डाल दी जाएँ'). For the bulls, having a nose ring was a symbol of subjugation and an attack on their self-respect. To protect their pride (अभिमान) from this humiliation, they decided to break the ropes and run back to their original owner, Jhoori, where they were treated with love and respect.