MCQ: Grounds for Divorce – Section 13(1)(ia) Aur (ib) Ke Beech Koi Fark Hai?

Yeh MCQ hain DU LLB Entrance ke liye: A husband filed for divorce against his wife citing 'mental cruelty' as ground. He claimed that she had refused to have sex with him for the last 5 years, leading to a breakdown of the marriage. Does this come under section 13(1)(ia) (adultery) or section 13(1)(ib) (cruelty) of the Hindu Marriage Act?

Mera friend argue karta hai ki yeh section 13(1)(ib) se related hai kyunki yeh mental cruelty ka case hai, jo adultery se alag hai. Lekin main kehta hoon ki yeh 'moral coercion' hai aur yeh section 13(1)(ia) se related hai.