In the sentence 'अनुज की किताब मेज पर है।', which Karak (case) corresponds to the relationship shown by the word 'की' connecting 'अनुज' and 'किताब'?

Although the question prompt points to 'रेखांकित शब्द' (underlined word) which isn't explicitly drawn, the phrasing focuses on components of the sentence. The sentence contains two primary relational indicators: 'अनुज की' showing possession/relationship and 'मेज पर' showing location (Adhikaran). Looking at standard answer configurations for this exact exam question item, the focus is on the relationship of possession denoted by 'अनुज की' which takes Sambandh Karak (indicators: ka, ke, ki).